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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN WINGFIELD</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JIM HART</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JENAL ZAK</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>HEATHER SHORT PHD</PersonNm>
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      <Form990PartVIISectionAGrp>
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      <Form990PartVIISectionAGrp>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LAURA RAY</PersonNm>
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      <CompensationFromOtherSrcsInd>false</CompensationFromOtherSrcsInd>
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        <BookValueAmt>11858</BookValueAmt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <NetUnrealizedGainsInvstAmt>3169</NetUnrealizedGainsInvstAmt>
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      <RevenueNotReportedAmt>420742</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>2360473</RevenueSubtotalAmt>
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      <RevenueNotReportedFinclStmtAmt>773</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>2361246</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>2292964</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>361167</DonatedServicesUseFcltsAmt>
      <OtherExpensesIncludedAmt>56406</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>417573</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>1875391</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>773</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>773</ExpensesNotRptFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 1, PART III, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>TERMS FOR NOT REPORTING PER SFAS 116 WE COLLECT ARTIFACTS RELATING TO THE HISTORY OF ST. JOSEPH RIVER VALLEY AND NORTHERN INDIANA. OUR COLLECTIONS ARE MAINTAINED FOR PUBLIC EXHIBITION, EDUCATION, AND RESEARCH IN FURTERANCE OF PUBLIC SERVICES RATHER THAN FINANCIAL GAIN. COLLECTIONS ARE THE MOST VALUABLE ASSET OF THE SOCIETY, AND ARE PROTECTED, KEPT UNENCUMBERED, CARED FOR AND PRESERVED. AS A MATTER OF POLICY, THE PROCEEDS OF ITEMS FOR COLLECTIONS THAT ARE SOLD ARE USED TO ACQUIRE OTHER ITEMS FOR COLLECTIONS OR TO PRESERVE AND CONSERVE THOSE ITEMS IN THE COLLECTIONS. OUR COLLECTIONS ARE COMPRISED OF APPROXIMATELY 500,000 INDIVIDUAL ITEMS WITH AN INSURED VALUE OF 7,000,000. WE DO NOT INCLUDE EITHER THE COST OR THE VALUE OF OUR COLLECTIONS IN THE STATEMENT OF FINANCIAL POSITION, NOR DO WE RECOGNIZE GIFTS OF COLLECTION ITEMS AS REVENUE IN THE STATEMENTS OF ACTIVITIES. SINCE ITEMS ACQUIRED FOR COLLECTION BY PURCHASE ARE NOT CAPITALIZED, THE COST OF THESE ACQUISITIONS IS REPORTED AS DECREASES IN NET ASSETS IN THE STATEMENT OF ACTIVITIES, WHILE PROCEEDS FROM ITEM DISPOSED OR DEACCESSIONS ARE REPORTED AS INCREASES IN THE APPROPRIATE CLASS OF NET ASSETS IN THE STATEMENTS OF ACTIVITIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 2, PART V, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>INCOME FROM THE SOCIETY'S ENDOWMENT FUND, WHICH IS ADMINISTERED BY THE RELATED NORTHERN INDIANA HISTORICAL SOCIETY FOUNDATION, IS USED TO SUPPORT THE SOCIETY'S PROGRAMS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 3, PART X</FormAndLineReferenceDesc>
        <ExplanationTxt>WE RECOGNIZE THE TAX BENEFIT FROM AN UNCERTAIN TAX POSITION ONLY IF IT IS MORE LIKELY THAN NOT THAT THE POSITION WILL BE SUSTAINED ON EXAMINATION BY TAXING AUTHORITIES BASED ON THE TECHNICAL MERITS OF THE POSITION. THE TAX BENEFITS RECOGNIZED IN THE FINANCIAL STATEMENTS FROM SUCH A POSITION ARE MEASURED BASED ON THE LARGEST BENEFIT THAT HAS A GREATER THAN 50% LIKELIHOOD OF BEING REALIZED UPON ULTIMATE SETTLEMENT. EXAMPLES OF TAX POSITIONS INCLUDE OUR TAX-EXEMPT STATUS AND POSITIONS RELATED TO THE POTENTIAL SOURCES OF UNRELATED BUSINESS TAXABLE INCOME. WE HAVE NOT IDENTIFIED ANY UNCERTAIN TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN, AND THERE ARE NO UNRECOGNIZED TAX BENEFITS RECORDED AS LIABILITIES IN THE ACCOMPANYING FINANCIAL STATEMENTS. WE CLASSIFY INTEREST AND PENALTIES, IF ANY, ASSOCIATED WITH UNCERTAIN TAX POSITIONS AS A COMPONENT OF INCOME TAX EXPENSE, AND THERE WAS NO ACCRUED INTEREST OR ANY PENALTIES RELATED TO UNRECOGNIZED TAX BENEFITS AT EITHER DECEMBER 31, 2025 OR 2024, OR ANY INTEREST OR PENALTIES EXPENSE RELATED TO UNRECOGNIZED TAX BENEFITS FOR THE YEARS THEN ENDED. WE ARE NO LONGER SUBJECT TO EXAMINATION BY THE INTERNAL REVENUE SERVICE OR THE STATE OF INDIANA FOR YEARS PRIOR TO DECEMBER 31, 2022.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 4, PART XI, LINE 2D</FormAndLineReferenceDesc>
        <ExplanationTxt>COST OF GOODS SOLD 14,429 SPECIAL EVENT EXPENSES 41,977</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 4, PART XII, LINE 2D</FormAndLineReferenceDesc>
        <ExplanationTxt>COST OF GOODS SOLD 14,429 SPECIAL EVENT EXPENSES 41,977</ExplanationTxt>
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        <Event1Nm>ANNUAL GALA</Event1Nm>
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        <CharitableContriEvent1Amt>279355</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>11200</GrossRevenueEvent1Amt>
        <RentFacilityCostsEvent1Amt>18888</RentFacilityCostsEvent1Amt>
        <FoodAndBeverageEvent1Amt>21419</FoodAndBeverageEvent1Amt>
        <EntertainmentEvent1Amt>4764</EntertainmentEvent1Amt>
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        <Event2Nm>JUNETEENTH LUNC</Event2Nm>
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        <RentFcltyCostsTotalEventsAmt>18888</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>21419</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>4764</EntertainmentTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>8388</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>53459</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>-35109</NetIncomeSummaryAmt>
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        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>226</ContributionCnt>
        <MethodOfDeterminingRevenuesTxt>NOT VALUED</MethodOfDeterminingRevenuesTxt>
      </HistoricalArtifactsGrp>
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>true</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>false</ThirdPartiesUsedInd>
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        <FormAndLineReferenceDesc>SCHEDULE M, PAGE 2, PART II</FormAndLineReferenceDesc>
        <ExplanationTxt>THE NUMBER OF CONTRIBUTIONS OR ITEMS CONTRIBUTED IN LINE 22 IS AN ESTIMATE OF THE ITEMS CONTRIBUTED TO OUR COLLECTION.</ExplanationTxt>
      </SupplementalInformationDetail>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 2, PART III, LINE 4A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE HISTORY MUSEUM PRESERVES OUR REGION'S HERITAGE AND EDUCATES THE PUBLIC THROUGH OUR COLLECTIONS, EXHIBITS, AND PROGRAMS TO DEVELOP AN INFORMED UNDERSTANDING OF THE PAST. IN 2025: - THERE WERE 50,847 ADMISSIONS, 12,155 SCHOOL CHILDREN, 42 RENTAL EVENTS, 59 BUS TUOUR GROUPS,AND 744 MEMBERS. - EXHIBITS INCUDED 3 NEW EXHIBITS IN CHANGING GALLERIES, 3 CARRY-OVER EXHIBITS FROM THE PREVIOUS YEAR, AND 1 PERMANENT EXHIBIT. - EDUCATION AND PROGRAMMING - 27 PUBLIC PROGRAMS AND LECTURES, 5 TEACHER EVENTS, 5 PERFORMANCES OF A PLAY, 3 MUSICAL EVENTS. 2,384 CHILDREN PARTICIPATED IN CABIN DAYS PROGRAMMING, PLUS 2,972 PEOPLE PARTICIPATED IN OUT TOUCH-A-TRUCK AND TRUNK-OR-TREAT FAMILY EVENTS, AND OUR 40 PODCAST EPISODES RECEIVED OVER 6,000 DOWNLOADS. - FACILITIES - OVER 25 FACILITY IMPROVEMENTS: UPGRADES TO BUILDING MECHANICALS, LIFE SAFTEY, AND GROUNDS/GARDENS. - THE MUSEUM ACHIEVED REACCREDITATION FROM THE AMERICAN ALLIANCE OF MUSEUMS AND WAS INDUCTED INTO THE SOUTH BEND COMMUNITY HALL OF FAME FOR SIGNIFICANT CONTRIBUTIONS TO EDUCATION. EXPENSES REPORTED IN THIS SCHEDULE DO NOT INCLUDE 361,167 OF THE VALUE OF DONATED FACILITIES INCLUDED IN THE ORGANIZATION'S AUDITED FINANCIAL STATEMENTS BUT NOT REPORTABLE UNDER TAX LAW.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ENTIRE BOARD WAS PROVIDED A COPY OF FORM 990, EXCEPT FOR SCHEDULE B, FOR REVIEW BEFORE THE RETURN WAS APPROVED AT THE JUNE 2026 BOARD MEETING AND WAS SIGNED BY THE TREASURER. THE POLICY OF REDACTING SCHEDULE B FROM BOARD REVIEW WAS ADOPTED BECAUSE THE ORGANIZATION'S POLICY IS TO KEEP DONOR INFORMATION CONFIDENTIAL AND BECAUSE MANY BOARD MEMBERS ARE DONORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S CONFLICT OF INTEREST POLICY IS MONITORED AND ENFORCED THROUGH ANNUAL DISTRIBUTION OF THE POLICY TO EACH BOARD MEMBER, WHO MUST SIGN AN ACKNOWLEDGEMENT AND DECLARE WHETHER OR NOT HE OR SHE HAS A CONFLICT. IF A CONFLICT EXISTS, THE AFFECTED BOARD MEMBER MUST NOT VOTE ON THE MATTER. IN CASES IN WHICH DISCLOSURE OF THE CONFLICT OR ABSTENTION IS NOT ADEQUATE, THE MEMBER MUST RESIGN.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION OF THE EXECUTIVE DIRECTOR IS DETERMINED BY THE INDEPENDENT EXECUTIVE COMMITTEE BASED ON PERFORMANCE REVIEW. THAT COMPENSATION WAS LAST DETERMINED IN DECEMBER 2024.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15B</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION OF OTHER OFFICERS OR KEY EMPLOYEES IS DETERMINED IN A SIMILAR MANNER TO THAT USED TO DETERMINE THE COMPENSATION OF THE EXECUTIVE DIRECTOR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE MADE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>COST OF GOODS SOLD 14,429 SPECIAL EVENT EXPENSES 41,977 COST OF GOODS SOLD -14,429 SPECIAL EVENT EXPENSES -41,977</ExplanationTxt>
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          <CityNm>SOUTH BEND</CityNm>
          <StateAbbreviationCd>IN</StateAbbreviationCd>
          <ZIPCd>46601</ZIPCd>
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        <ExemptCodeSectionTxt>501C3</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>12A</PublicCharityStatusTxt>
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          <BusinessNameLine1Txt>NO IN HIS</BusinessNameLine1Txt>
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      <GiftGrntCapContriFromOthOrgInd>true</GiftGrntCapContriFromOthOrgInd>
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        </OtherOrganizationName>
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        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
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          <BusinessNameLine1Txt>NO INDIANA HISTORICAL SOCIETY FOUN</BusinessNameLine1Txt>
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          <BusinessNameLine1Txt>NO INDIANA HISTORICAL SOCIETY FOUN</BusinessNameLine1Txt>
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        <TransactionTypeTxt>O</TransactionTypeTxt>
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