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        <link:linkbaseRef xlink:type="simple" xlink:href="pw-20251231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links" />
      </appinfo>
    </annotation>
    <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
    <import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd" />
    <import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd" />
    <import namespace="http://fasb.org/us-types/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd" />
    <import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd" />
    <import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd" />
    <import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd" />
    <import namespace="http://xbrl.sec.gov/cyd/2025" schemaLocation="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd" />
    <import namespace="http://xbrl.sec.gov/stpr/2025" schemaLocation="https://xbrl.sec.gov/stpr/2025/stpr-2025.xsd" />
    <element id="PW_CommonSharesMember" name="CommonSharesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_Sec7.75SeriesCumulativeRedeemablePerpetualPreferredStockLiquidationPreference25PerShareMember" name="Sec7.75SeriesCumulativeRedeemablePerpetualPreferredStockLiquidationPreference25PerShareMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_SeriesACumulativeRedeemablePerpetualPreferredStockMember" name="SeriesACumulativeRedeemablePerpetualPreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MichiganAndNebraskaPropertiesMember" name="MichiganAndNebraskaPropertiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhousePropertiesMember" name="GreenhousePropertiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MIPEquipmentMember" name="MIPEquipmentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AuxiliaryBuildingsMember" name="AuxiliaryBuildingsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PWCACanndescentLLCMember" name="PWCACanndescentLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PWRegulusSolarLLCMember" name="PWRegulusSolarLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PittsburghWestVirginiaRailroadMember" name="PittsburghWestVirginiaRailroadMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_REITSecuritiesMember" name="REITSecuritiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AnchorHydroMember" name="AnchorHydroMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_TwoMainePropertiesMember" name="TwoMainePropertiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PWPWVLoanMember" name="PWPWVLoanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_TwoThousandFifteenPWRSLoanMember" name="TwoThousandFifteenPWRSLoanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenHouseLoanMember" name="GreenHouseLoanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_NorfolkSouthernRailwayMember" name="NorfolkSouthernRailwayMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_RegulusSolarLLCMember" name="RegulusSolarLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MarengoCannabisLLCMember" name="MarengoCannabisLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PWSalisburySolarLLCMember" name="PWSalisburySolarLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_SolarFarmLeaseMember" name="SolarFarmLeaseMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseOneMember" name="GreenhouseCannabisLeaseOneMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseTwoMember" name="GreenhouseCannabisLeaseTwoMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseThreeMember" name="GreenhouseCannabisLeaseThreeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseFourMember" name="GreenhouseCannabisLeaseFourMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseFiveMember" name="GreenhouseCannabisLeaseFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseSixMember" name="GreenhouseCannabisLeaseSixMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseSevenMember" name="GreenhouseCannabisLeaseSevenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseEightMember" name="GreenhouseCannabisLeaseEightMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisLeaseNineMember" name="GreenhouseCannabisLeaseNineMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AssetHeldForUseMember" name="AssetHeldForUseMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MunicipalDebtMember" name="MunicipalDebtMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PWSSTermLoanMember" name="PWSSTermLoanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PWPWVLoanAgreementMember" name="PWPWVLoanAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DebtFacilityMember" name="DebtFacilityMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_FinanceLoanAgreementMember" name="FinanceLoanAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_NebraskaGreenhouseMember" name="NebraskaGreenhouseMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AssetsHeldForSaleMember" name="AssetsHeldForSaleMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_SalesAgreementMember" name="SalesAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AllianceGlobalPartnersMember" name="AllianceGlobalPartnersMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_CultivationAndProcessingFacilitiesNetOfAccumulatedDepreciation" name="CultivationAndProcessingFacilitiesNetOfAccumulatedDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MortgageLoanReceivables" name="MortgageLoanReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_RentalIncome" name="RentalIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_RentalIncomeRelatedParties" name="RentalIncomeRelatedParties" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ForgivenessOfAccountsPayable" name="ForgivenessOfAccountsPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_InterestExpenseAddedToDebtPrincipal" name="InterestExpenseAddedToDebtPrincipal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_IncreaseDecreaseInDeferredRentReceivable" name="IncreaseDecreaseInDeferredRentReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_UnrealizedGainOnMarketableSecurities" name="UnrealizedGainOnMarketableSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_LandAndGreenhousePropertiesTransferredInLieuOfDebtRepayment" name="LandAndGreenhousePropertiesTransferredInLieuOfDebtRepayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AccruedInterestAndLoanExpensesTransferredToLoan" name="AccruedInterestAndLoanExpensesTransferredToLoan" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_EquipmentWrittenOffAgainstFinancingLiabilities" name="EquipmentWrittenOffAgainstFinancingLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_OfferingRelatedExpensesIncludedInAccountsPayable" name="OfferingRelatedExpensesIncludedInAccountsPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DisclosureDirectFinancingLeasesAndOperatingLeasesAbstract" name="DisclosureDirectFinancingLeasesAndOperatingLeasesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ImpactOfNewAccountingStandardsPolicyTextBlock" name="ImpactOfNewAccountingStandardsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AssetsHeldForSalePolicyTextBlock" name="AssetsHeldForSalePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_NetInvestmentInDirectFinancingLeaseRailroadPolicyTextBlock" name="NetInvestmentInDirectFinancingLeaseRailroadPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_OtherIncomePolicyTextBlock" name="OtherIncomePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ForgivenessOfAccountsPayablePolicyTextBlock" name="ForgivenessOfAccountsPayablePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_OtherAssetsPolicyTextBlock" name="OtherAssetsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_InterestExpenseIncludingLoanModificationExpensesPolicyTextBlock" name="InterestExpenseIncludingLoanModificationExpensesPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ScheduleOfBreakdownOfRentalIncomeRecognitionTableTextBlock" name="ScheduleOfBreakdownOfRentalIncomeRecognitionTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AssetsAndLiabilitiesOfAssetsHeldForSaleTableTextBlock" name="AssetsAndLiabilitiesOfAssetsHeldForSaleTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MinimumPercentageOfTaxableIncomeToBeDistributedToShareholders" name="MinimumPercentageOfTaxableIncomeToBeDistributedToShareholders" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_CashBasisRent" name="CashBasisRent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_SecurityDepositRecognizedAsRentalIncome" name="SecurityDepositRecognizedAsRentalIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AccountingPoliciesTable" name="AccountingPoliciesTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="PW_DeferredRentReceivablesIncludingOfHeldForSaleAmount" name="DeferredRentReceivablesIncludingOfHeldForSaleAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_RealEstateInvestment" name="RealEstateInvestment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_LossContingencyUpFront" name="LossContingencyUpFront" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_LossContingencyPerMonth" name="LossContingencyPerMonth" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AmortizationTerm" name="AmortizationTerm" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ConcentrationRiskThresholdPercentage" name="ConcentrationRiskThresholdPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DispositionsOfPropertyAmortizedPeriod" name="DispositionsOfPropertyAmortizedPeriod" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DebtInstrumentInterestRateStatedMaturityPercentage" name="DebtInstrumentInterestRateStatedMaturityPercentage" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DisclosureDirectFinancingLeasesAndOperatingLeasesTable" name="DisclosureDirectFinancingLeasesAndOperatingLeasesTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="PW_LessorOperatingLeaseRenewalOptions" name="LessorOperatingLeaseRenewalOptions" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="PW_TripleNetLease" name="TripleNetLease" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="PW_TrustLoanModificationExpense" name="TrustLoanModificationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_LongTermDebtObligations" name="LongTermDebtObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCultivationAndProcessingFacilitiesNetOfAccumulatedDepreciationAssetsHeldForSale" name="GreenhouseCultivationAndProcessingFacilitiesNetOfAccumulatedDepreciationAssetsHeldForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AccountsPayableHeldForSale" name="AccountsPayableHeldForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AccruedExpensesHeldForSale" name="AccruedExpensesHeldForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_OtherLiabilitiesHeldForSale" name="OtherLiabilitiesHeldForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsEstimateOfForfeitureRate" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsEstimateOfForfeitureRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PercentageOfAnnualOrdinaryTaxableIncomeDistributed" name="PercentageOfAnnualOrdinaryTaxableIncomeDistributed" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_WroteOffAccruedPropertyTax" name="WroteOffAccruedPropertyTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_LossOnAccruedPropertyTax" name="LossOnAccruedPropertyTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_InvestmentInMarketableSecurities" name="InvestmentInMarketableSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_IncreaseDecreaseInOtherAssets" name="IncreaseDecreaseInOtherAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ImpairmentOfLongLivedAssetsMortgageDebtReceivables" name="ImpairmentOfLongLivedAssetsMortgageDebtReceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ForgivenessOfAccountsPayables" name="ForgivenessOfAccountsPayables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
</schema>
