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      <PayrollTaxesGrp>
        <TotalAmt>13219</TotalAmt>
        <ProgramServicesAmt>3468</ProgramServicesAmt>
        <ManagementAndGeneralAmt>7560</ManagementAndGeneralAmt>
        <FundraisingAmt>2191</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>1000</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1000</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>2307</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2307</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesProfFundraising>
        <TotalAmt>4200</TotalAmt>
        <FundraisingAmt>4200</FundraisingAmt>
      </FeesForServicesProfFundraising>
      <AdvertisingGrp>
        <TotalAmt>3229</TotalAmt>
        <ProgramServicesAmt>130</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3099</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>13437</TotalAmt>
        <ProgramServicesAmt>2393</ProgramServicesAmt>
        <ManagementAndGeneralAmt>11044</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>1065</TotalAmt>
        <ProgramServicesAmt>1065</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>41687</TotalAmt>
        <ProgramServicesAmt>25012</ProgramServicesAmt>
        <ManagementAndGeneralAmt>16675</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>325</TotalAmt>
        <ProgramServicesAmt>325</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>2445</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2178</ManagementAndGeneralAmt>
        <FundraisingAmt>267</FundraisingAmt>
      </ConferencesMeetingsGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>4423</TotalAmt>
        <ProgramServicesAmt>2654</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1769</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>14700</TotalAmt>
        <ProgramServicesAmt>14183</ProgramServicesAmt>
        <ManagementAndGeneralAmt>517</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>EXHIBIT COSTS</Desc>
        <TotalAmt>8614</TotalAmt>
        <ProgramServicesAmt>8614</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>MEMBERSHIP DUES</Desc>
        <TotalAmt>938</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>938</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>SUPPLIES/SMALL EQP</Desc>
        <TotalAmt>8328</TotalAmt>
        <ProgramServicesAmt>3522</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4806</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>MISC</Desc>
        <TotalAmt>893</TotalAmt>
        <ProgramServicesAmt>225</ProgramServicesAmt>
        <ManagementAndGeneralAmt>668</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>325088</TotalAmt>
        <ProgramServicesAmt>115630</ProgramServicesAmt>
        <ManagementAndGeneralAmt>169048</ManagementAndGeneralAmt>
        <FundraisingAmt>40410</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>77726</BOYAmt>
        <EOYAmt>102598</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>95000</BOYAmt>
        <EOYAmt>95000</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>498</BOYAmt>
        <EOYAmt>23713</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>253837</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>7640</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>151709</BOYAmt>
        <EOYAmt>246197</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <TotalAssetsGrp>
        <BOYAmt>324933</BOYAmt>
        <EOYAmt>467508</EOYAmt>
      </TotalAssetsGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>229386</BOYAmt>
        <EOYAmt>371961</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>95547</BOYAmt>
        <EOYAmt>95547</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>324933</BOYAmt>
        <EOYAmt>467508</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>324933</BOYAmt>
        <EOYAmt>467508</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>142575</ReconcilationRevenueExpnssAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>false</FSAuditedInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="IRS990ScheduleA-01" softwareId="23017509">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <OtherSupportSumAmt>0</OtherSupportSumAmt>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>290575</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>135880</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>149321</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>154123</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>306873</CurrentTaxYearAmt>
        <TotalAmt>1036772</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TaxRevLeviedOrgnztnlBnft170Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft170Grp>
      <GovtFurnSrvcFcltsVl170Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>290575</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>135880</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>149321</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>154123</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>306873</CurrentTaxYearAmt>
        <TotalAmt>1036772</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>88364</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>948408</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>70767</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>73781</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>73859</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>77780</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>79899</CurrentTaxYearAmt>
        <TotalAmt>376086</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <UnrelatedBusinessNetIncm170Grp>
        <TotalAmt>0</TotalAmt>
      </UnrelatedBusinessNetIncm170Grp>
      <OtherIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>1759</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>9161</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>26499</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>22161</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>28123</CurrentTaxYearAmt>
        <TotalAmt>87703</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>1500561</TotalSupportAmt>
      <PublicSupportCY170Pct>0.63200</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.60340</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
      <PublicSupportTotal509Amt>0</PublicSupportTotal509Amt>
      <PublicSupportCY509Pct>0</PublicSupportCY509Pct>
      <InvestmentIncomeCYPct>0</InvestmentIncomeCYPct>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Pt II Ln 10</FormAndLineReferenceDesc>
        <ExplanationTxt>Other Income Part II, Line 10 Description: FUNDRAISING 2019: 1759. 2020: 9161. 2021: 26499. 2022: 22161. 2023: 28123.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB-01">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="IRS990ScheduleD-01" softwareId="23017509">
      <CollectionUsedPubExhibitionInd>X</CollectionUsedPubExhibitionInd>
      <CollUsedScholarlyRsrchInd>X</CollUsedScholarlyRsrchInd>
      <CollectionUsedPreservationInd>X</CollectionUsedPreservationInd>
      <SolicitedAssetsSaleInd>true</SolicitedAssetsSaleInd>
      <BuildingsGrp>
        <InvestmentCostOrOtherBasisAmt>0</InvestmentCostOrOtherBasisAmt>
        <OtherCostOrOtherBasisAmt>253837</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>7640</DepreciationAmt>
        <BookValueAmt>246197</BookValueAmt>
      </BuildingsGrp>
      <TotalBookValueLandBuildingsAmt>246197</TotalBookValueLandBuildingsAmt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt III, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>HISTORICAL COLLECTION AMASSED SINCE 1966 DEPICTING THE HISTORY OF MESA</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleG documentId="IRS990ScheduleG-01">
      <FundraisingEventInformationGrp>
        <Event1Nm>BOOK SALE</Event1Nm>
        <GrossReceiptsEvent1Amt>16730</GrossReceiptsEvent1Amt>
        <GrossRevenueEvent1Amt>16730</GrossRevenueEvent1Amt>
        <OtherDirectExpensesEvent1Amt>751</OtherDirectExpensesEvent1Amt>
        <Event2Nm>ARTS/CRAFTS FAIR</Event2Nm>
        <GrossReceiptsEvent2Amt>6741</GrossReceiptsEvent2Amt>
        <CharitableContriEvent2Amt>2250</CharitableContriEvent2Amt>
        <GrossRevenueEvent2Amt>4491</GrossRevenueEvent2Amt>
        <OtherDirectExpensesEvent2Amt>846</OtherDirectExpensesEvent2Amt>
        <OtherEventsTotalCnt>4</OtherEventsTotalCnt>
        <GrossReceiptsOtherEventsAmt>9389</GrossReceiptsOtherEventsAmt>
        <GrossRevenueOtherEventsAmt>9389</GrossRevenueOtherEventsAmt>
        <OthDirectExpnssOtherEventsAmt>890</OthDirectExpnssOtherEventsAmt>
        <GrossReceiptsTotalAmt>32860</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>2250</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>30610</GrossRevenueTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>2487</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>2487</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>28123</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="IRS990ScheduleO-01" softwareId="23017509">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>AVAILABLE UPON REQUEST</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>THE RETURN IS CIRCULATED TO THE BOARD FOR REVIEW AND COMMENT PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>BOARD MEMBERS COMPLETE A CONFLICT OF INTEREST FORM YEARLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>EXECUTIVE DIRECTORS SALARY IS DETERMINED BASED ON COMPARISON TO OTHER DIRECTORS WITH SIMILAR CREDENTIALS FOR A COMPARABLE SIZED MUSEUM.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>