Liabilities / Assets
64th percentile
Higher debt load relative to assets than 64% of similar nonprofits.
EIN 52-1006116 • 501(c)3 • Rockville, MD
Profile
To preserve buildings, objects
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
64th percentile
Higher debt load relative to assets than 64% of similar nonprofits.
Liabilities / Revenue
80th percentile
Higher debt load relative to revenue than 80% of similar nonprofits.
Net Margin
81st percentile
Higher net margin than 81% of similar nonprofits.
Top Officer Pay
69th percentile
Higher top officer pay than 69% of similar nonprofits.
Top officer pay equals 24.1% of source-year revenue.
Asset Growth
84th percentile
Faster asset growth than 84% of similar nonprofits.
Revenue Growth
81st percentile
Faster revenue growth than 81% of similar nonprofits.
Assets
Up$1,210,544
Up $267,862 (+28%) from 2024
Liabilities
Up$200,504
Up $109,333 (+120%) from 2024
Net Assets
Up$1,010,040
Up $158,529 (+19%) from 2024
Revenue
Up$438,344
Up $131,242 (+43%) from 2024
Expenses
Up$298,261
Up $16,890 (+6.0%) from 2024
Net Income
Up$140,083
Up $114,352 (+444%) from 2024
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
To preserve buildings, objects and information important to rockvilles heritage
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $719,357 | $903,778 | ▲ $184,421 |
| Cash and Non-Interest-Bearing Accounts | $63,335 | $156,855 | ▲ $93,520 |
| Investments in Publicly Traded Securities | $154,512 | $147,001 | ▼ $7,511 |
| Accounts Receivable | $5,228 | $2,660 | ▼ $2,568 |
| Total Assets | $942,682 | $1,210,544 | ▲ $267,862 |
| Other Assets Total | $250 | $250 | → $0 |
| Liabilities | |||
| Mortgage Notes Payable Secured by Investment Property | $8,939 | $121,746 | ▲ $112,807 |
| Unsecured Notes Loans Payable | $48,824 | $46,004 | ▼ $2,820 |
| Deferred Revenue | $20,061 | $20,061 | → $0 |
| Accounts Payable and Accrued Expenses | $10,747 | $10,093 | ▼ $654 |
| Other Liabilities | $2,600 | $2,600 | → $0 |
| Total Liabilities | $91,171 | $200,504 | ▲ $109,333 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $745,374 | $904,121 | ▲ $158,747 |
| Net Assets With Donor Restrictions | $106,137 | $105,919 | ▼ $218 |
| Total Net Assets Fund Balance | $851,511 | $1,010,040 | ▲ $158,529 |
| Total Liabilities and Net Assets / Fund Balance | $942,682 | $1,210,544 | ▲ $267,862 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Land | $694,852 | - | $694,852 |
| Buildings | $202,820 | $480,063 | $682,883 |
| Equipment | $3,028 | $8,627 | $11,655 |
| Other Land Buildings | $3,078 | $3,558 | $6,636 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2024 | $90,264 | $25 | ▲ $5,162 | $0 | $95,451 |
| 2023 | $108,174 | $210 | ▲ $9,033 | $27,153 | $90,264 |
| 2022 | $101,564 | $435 | ▲ $6,175 | $0 | $108,174 |
| 2021 | $108,864 | $125 | ▼ $7,425 | $0 | $101,564 |
| 2020 | $97,693 | $125 | ▲ $11,046 | $0 | $108,864 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Nancy Pickard | Executive Director | FT | $92,405 | $13,344 | $105,749 |
| Name | Title |
|---|---|
| Debra Liverpool | President |
| Nancee Simonson | Vice President |
| Dick Stoner | Director |
| Hannelore Quigley | Director |
| Jim Gilchrist | Director |
| Noreen Bryan | Director |
| Paul Newman | Director |
| Stephen Daoust | Director |
| Eileen Mcguckian | Secretary |
| Paul Hillstrom | Treasurer |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $161,869 |
| Other Expenses | $136,392 |
| Total Fundraising Expense | $20,033 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Current Officers, Directors, Trustees, and Key Employees | $81,099 | $23,171 | $11,586 | $115,856 |
| Other Salaries and Wages | $24,685 | $7,053 | $3,526 | $35,264 |
| Occupancy | $15,550 | $3,887 | $2,429 | $21,866 |
| Fees for Services Other | $7,884 | $2,253 | $1,126 | $11,263 |
| Payroll Taxes | $7,524 | $2,150 | $1,075 | $10,749 |
| Insurance | $0 | $8,901 | $0 | $8,901 |
| All Other Expenses | $6,680 | $511 | $74 | $7,265 |
| Other Expenses | $0 | $3,329 | $0 | $3,329 |
| Office Expenses | $1,515 | $433 | $217 | $2,165 |
| Interest | $2,085 | $0 | $0 | $2,085 |
| Depreciation Depletion | $1,247 | $0 | $0 | $1,247 |
| Total Functional Expenses | $217,688 | $60,540 | $20,033 | $298,261 |
| Line Item | Amount |
|---|---|
| Fundraising Direct Expenses | $1,475 |
| Fundraising Gross Income | $0 |
| Professional Fundraising Fees | $0 |
| Liability | Amount |
|---|---|
| Tenant Security Deposits | $2,600 |
“Members of the governing body review the 990 at a board meeting”
“Officers, directors, trustees, and key employees are required to report any potential conflicts during the annual meeting”
“Statements are available to the public upon request”
“The organization has a written policy that adheres to the easement requirements of the property owners and certain performance requirements.”
“The organization does not record any transactions or financial impact relating to the easements.”
“In accordance with the provisions of fasb asc topic 958 on not-for-profit entities, the organization does not capitalize donated artifacts of historic value or recognize them as revenues or gains. Fasb asc 958 provides that such donations need not be recognized if they are added to collections that are held for public exhibition, education, or research in furtherance of public service rather than financial gain; are protected, kept unencumbered, cared for, and preserved; and are subject to a policy that requires the proceeds from sales of collection items to be used to advance the organizations mission.”
“Peerless rockville utilizes the collections to educate and interpret historic sites, present exhibits, protect and preserve rockvilles historic places, provide hands-on preservation opportunities, and make the resources accessible to the public of all ages and interests.”
“Endowment funds are intended to earn income for the organization that will be used to further the organizations mission.”
“The organization follows the recommendations of the financial accounting standards board (fasb) in its accounting standards codification (asc) for accounting of uncertainty in income taxes without any material effect to the financial statements. These recommendations clarify the accounting for uncertainty in income taxes by prescribing the recognition threshold a tax position is required to meet before being recognized in the financial statements. They also provide guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. Income tax benefits are recognized for income tax positions taken or expected to be taken in a tax return, only when it is determined the income tax position will more-likely-than-not be sustained upon examination by taxing authorities. The organization has analyzed tax positions taken for filing with the internal revenue service and all state jurisdictions where it operates. Management believes that income tax filing positions will be sustained upon examination and does not anticipate any adjustments that would result in a material adverse affect on the organizations financial condition, results of operations or cash flows. Accordingly, the organization has not recorded any reserves, or related accruals for interest and penalties for uncertain income tax positions at june 30, 2025 or 2024.the organizations returns remain open for three years for federal and state examination.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | true |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 10747 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 10093 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 5228 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 2660 |
| IRS990/AcctCompileOrReviewBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | TO PRESERVE BUILDINGS, OBJECTS AND INFORMATION IMPORTANT TO ROCKVILLES HERITAGE |
| IRS990/AllOtherContributionsAmt | 0 | 48932 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 74 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 511 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 6680 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 7265 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | NANCY PICKARD |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 3017620096 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 29 COURTHOUSE SQUARE 110 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | ROCKVILLE |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MD |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 20850 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 63335 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 156855 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | true |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 11586 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 23171 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 81099 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 115856 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | true |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContriRptFundraisingEventAmt | 0 | 1900 |
| IRS990/CostOfGoodsSoldAmt | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 447887 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 3044 |
| IRS990/CYOtherExpensesAmt | 0 | 136392 |
| IRS990/CYOtherRevenueAmt | 0 | -14726 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 2139 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 140083 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 161869 |
| IRS990/CYTotalExpensesAmt | 0 | 298261 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 20033 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 438344 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 20061 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 20061 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 1247 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 1247 |
| IRS990/Desc | 0 | HISTORIC PRESERVATION: CONDUCTED PRESERVATION PROJECTS, MAINTAINED HISTORIC PROPERTIES, DEVELOPED EDUCATIONAL PROGRAMS AND EXHIBITS, MAINTAINED MUSEUM COLLECTION AND REFERENCE LIBRARY. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 106137 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 105919 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | true |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 3 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 217688 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 1126 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 2253 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 7884 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 11263 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 13344 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | NANCY PICKARD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | DICK STONER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | STEPHEN DAOUST |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | PAUL NEWMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JIM GILCHRIST |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | NOREEN BRYAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | HANNELORE QUIGLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | DEBRA LIVERPOOL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | NANCEE SIMONSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | EILEEN MCGUCKIAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | PAUL HILLSTROM |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 92405 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | EXECUTIVE DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TREASURER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1974 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/FundraisingAmt | 0 | 1900 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 1475 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 10 |
| IRS990/GovernmentGrantsAmt | 0 | 389405 |
| IRS990/GrantAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 486018 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 31200 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 1390 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | true |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 10 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 0 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 8901 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 8901 |
| IRS990/InterestGrp/FundraisingAmt | 0 | 0 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 2085 |
| IRS990/InterestGrp/TotalAmt | 0 | 2085 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 3044 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 154512 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 147001 |
| IRS990/IRPDocumentCnt | 0 | 2 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 492248 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 719357 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 903778 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 1396026 |
| IRS990/LegalDomicileStateCd | 0 | MD |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 46199 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 7650 |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | TO PRESERVE BUILDINGS, OBJECTS AND INFORMATION IMPORTANT TO ROCKVILLES HERITAGE |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 8939 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 121746 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 851511 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1010040 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | -1475 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | -1475 |
| IRS990/NetIncmFromFundraisingEvtGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 1390 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 1390 |
| IRS990/NetRentalIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | -14999 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | -14999 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 18446 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 745374 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 904121 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 2429 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 3887 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 15550 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 21866 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 217 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 433 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 1515 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 2165 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 250 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 250 |
| IRS990/OtherExpensesGrp/Desc | 0 | PROGRAM |
| IRS990/OtherExpensesGrp/Desc | 1 | PRE-CONSTRUCTION COSTS |
| IRS990/OtherExpensesGrp/Desc | 2 | MISCELLANEOUS |
| IRS990/OtherExpensesGrp/Desc | 3 | TELEPHONE |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 8852 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 3 | 3329 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 8257 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 61162 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 8257 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 61162 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 8852 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 3329 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 2600 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 2600 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | OTHER |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 0 | 0 |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 358 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 358 |
| IRS990/OtherRevenueMiscGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/OtherRevenueTotalAmt | 0 | 358 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 3526 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 7053 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 24685 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 35264 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 1075 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 2150 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 7524 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 10749 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | NANCY PICKARD |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 812900 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | ACTIVITIES AND EVENTS |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 2139 |
| IRS990/ProgramServiceRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 263558 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 46640 |
| IRS990/PYOtherExpensesAmt | 0 | 105507 |
| IRS990/PYOtherRevenueAmt | 0 | -9556 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 6460 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 25731 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 175864 |
| IRS990/PYTotalExpensesAmt | 0 | 281371 |
| IRS990/PYTotalRevenueAmt | 0 | 307102 |
| IRS990/QuidProQuoContributionsInd | 0 | true |
| IRS990/QuidProQuoContriDisclInd | 0 | true |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 140083 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | -14999 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 2139 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | Other Income Part II, Line 10 Description: OTHER 2020: 862. 2021: 340. 2022: 93. 2023: 5264. 2024: 358. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | Pt II Ln 10 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 392982 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 263558 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 235141 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 191542 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 242300 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 1325523 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 34244 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 34121 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 33222 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 33212 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 47271 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 182070 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 170216 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearAmt | 0 | 358 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 5264 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 93 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 340 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 862 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 6917 |
| IRS990ScheduleA/OtherSupportSumAmt | 0 | 0 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.83580 |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.76670 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 1265813 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 0 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 59710 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 392982 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 263558 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 235141 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 191542 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 242300 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 1325523 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 1514510 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | true |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 202820 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 480063 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 682883 |
| IRS990ScheduleD/CollectionUsedPreservationInd | 0 | X |
| IRS990ScheduleD/CollectionUsedPubExhibitionInd | 0 | X |
| IRS990ScheduleD/CollUsedScholarlyRsrchInd | 0 | X |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 90264 |
| IRS990ScheduleD/CYEndwmtFundGrp/ContributionsAmt | 0 | 25 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 95451 |
| IRS990ScheduleD/CYEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 5162 |
| IRS990ScheduleD/CYEndwmtFundGrp/OtherExpendituresAmt | 0 | 0 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 108174 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/ContributionsAmt | 0 | 210 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 90264 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 9033 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 27153 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 101564 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/ContributionsAmt | 0 | 435 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 108174 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 6175 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 0 |
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