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   &lt;span&gt;(1) &lt;/span&gt;&lt;span style="text-decoration: underline;"&gt;Summary of significant accounting policies:&lt;/span&gt;
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  &lt;div style="margin-left: 36pt;"&gt; &lt;span&gt;&#160;&lt;/span&gt;&lt;span style="text-decoration: underline;"&gt;Basis of accounting -&lt;/span&gt; &lt;/div&gt;
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   &lt;span&gt;The accompanying financial statements of North European Oil Royalty Trust (the &#x201c;Trust&#x201d;) are prepared in accordance with the rules and regulations of the Securities and Exchange Commission. Financial statement balances and financial results are presented on a modified cash basis of accounting, which is a comprehensive basis of accounting other than accounting principles generally accepted in the United States (&#x201c;GAAP basis&#x201d;). &lt;/span&gt;&lt;span style="color: rgb(0, 0, 0);"&gt;In the opinion of management, all adjustments that are considered necessary for a fair presentation of these financial statements, including adjustments of a normal, recurring nature, have been included.&lt;/span&gt;
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   &lt;span&gt;On a modified cash basis, revenue is earned when cash is received and expenses are incurred when cash is paid. GAAP basis financial statements disclose revenue as earned and expenses as incurred, without regard to receipts or payments. The modified cash basis of accounting is utilized to permit the accrual for distributions to be paid to unit owners (those distributions approved by the Trustees for the Trust). The Trust&#x2019;s distributable income represents royalty income received by the Trust during the period plus interest income less any expenses incurred by the Trust, all on a cash basis. In the opinion of the Trustees, the use of the modified cash basis of accounting provides a more meaningful presentation to unit owners of the results of operations of the Trust.&lt;/span&gt;
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   &lt;span style="color: rgb(0, 0, 0);"&gt;The results of any interim period are not necessarily indicative of the results to be expected for the fiscal year. &lt;/span&gt;&lt;span&gt;These financial statements should be read in conjunction with the financial statements that were included in the Trust&#x2019;s Annual Report on&lt;/span&gt;&lt;span style="color: rgb(0, 0, 0);"&gt;&#160;&lt;/span&gt;&lt;span&gt;Form 10-K for the year ended October 31, 2025 (the &#x201c;2025 Form 10-K&#x201d;). The Statements of Assets, Liabilities and Trust Corpus included herein contain information from the Trust&#x2019;s 2025 Form 10-K.&lt;/span&gt;
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  &lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;Producing gas and oil royalty rights -&lt;/span&gt; &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="text-indent: 36pt;"&gt; &lt;span&gt;The rights to certain gas and oil royalties in Germany were transferred to the Trust at their net book value by North European Oil Company (the &#x201c;Company&#x201d;) (see Note 2). The net book value of the royalty rights has been reduced to one dollar ($1) in view of the fact that the remaining net book value of royalty rights is&lt;/span&gt;&lt;span style="font-style: italic;"&gt; de minimis&lt;/span&gt;&lt;span&gt; relative to annual royalties received and distributed by the Trust and does not bear any meaningful relationship to the fair value of such rights or the actual amount of proved producing reserves.&lt;/span&gt; &lt;/div&gt;&lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;Federal and state income taxes -&lt;/span&gt; &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="text-indent: 36pt;"&gt;
   &lt;span&gt;The Trust, as a grantor trust, is exempt from federal income taxes under a private letter ruling issued by the Internal Revenue Service. The Trust has no state income tax obligations.&lt;/span&gt;
  &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;Cash and cash equivalents -&lt;/span&gt; &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="text-indent: 36pt;"&gt; &lt;span&gt;Cash and cash equivalents are defined as amounts deposited in bank accounts and amounts invested in certificates of deposit and U.S. Treasury bills with original maturities generally of three months or less from the date of purchase. The investment options available to the Trust are limited in accordance with specific provisions of the Trust Agreement. &lt;/span&gt;&lt;span style="color: rgb(0, 0, 0);"&gt;In addition, the Trust held Euros 34,735, the equivalent of $40,425, in its German bank account as of April 30, 2026.&lt;/span&gt; &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;Net income per unit -&lt;/span&gt; &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="text-indent: 36pt;"&gt; &lt;span&gt;Net income per unit is based upon the number of units outstanding at the end of the period. As of both April 30, 2026 and 2025, there were 9,190,590 units of beneficial interest outstanding.&lt;/span&gt; &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;New accounting pronouncements -&lt;/span&gt;&lt;/div&gt;
  &lt;div style="margin-left: 36pt;"&gt;&#160;&lt;/div&gt;

  &lt;div style="text-indent: 45px; padding-left: 0px;"&gt;&#160;Recent accounting pronouncements pending adoption are either not applicable or are not&#160;expected to have a material impact on the Trust&#x2019;s financial condition or results of operation.&lt;/div&gt;</us-gaap:SignificantAccountingPoliciesTextBlock>
    <us-gaap:BasisOfAccountingPolicyPolicyTextBlock contextRef="c0" id="ixv-1410">&lt;div style="margin-left: 36pt;"&gt; &lt;span&gt;&#160;&lt;/span&gt;&lt;span style="text-decoration: underline;"&gt;Basis of accounting -&lt;/span&gt; &lt;/div&gt;&lt;div style="text-indent: 36pt;"&gt;
   &lt;span&gt;The accompanying financial statements of North European Oil Royalty Trust (the &#x201c;Trust&#x201d;) are prepared in accordance with the rules and regulations of the Securities and Exchange Commission. Financial statement balances and financial results are presented on a modified cash basis of accounting, which is a comprehensive basis of accounting other than accounting principles generally accepted in the United States (&#x201c;GAAP basis&#x201d;). &lt;/span&gt;&lt;span style="color: rgb(0, 0, 0);"&gt;In the opinion of management, all adjustments that are considered necessary for a fair presentation of these financial statements, including adjustments of a normal, recurring nature, have been included.&lt;/span&gt;
  &lt;/div&gt;&lt;div style="text-indent: 36pt;"&gt;
   &lt;span&gt;On a modified cash basis, revenue is earned when cash is received and expenses are incurred when cash is paid. GAAP basis financial statements disclose revenue as earned and expenses as incurred, without regard to receipts or payments. The modified cash basis of accounting is utilized to permit the accrual for distributions to be paid to unit owners (those distributions approved by the Trustees for the Trust). The Trust&#x2019;s distributable income represents royalty income received by the Trust during the period plus interest income less any expenses incurred by the Trust, all on a cash basis. In the opinion of the Trustees, the use of the modified cash basis of accounting provides a more meaningful presentation to unit owners of the results of operations of the Trust.&lt;/span&gt;
  &lt;/div&gt;&lt;div style="text-indent: 36pt;"&gt;
   &lt;span style="color: rgb(0, 0, 0);"&gt;The results of any interim period are not necessarily indicative of the results to be expected for the fiscal year. &lt;/span&gt;&lt;span&gt;These financial statements should be read in conjunction with the financial statements that were included in the Trust&#x2019;s Annual Report on&lt;/span&gt;&lt;span style="color: rgb(0, 0, 0);"&gt;&#160;&lt;/span&gt;&lt;span&gt;Form 10-K for the year ended October 31, 2025 (the &#x201c;2025 Form 10-K&#x201d;). The Statements of Assets, Liabilities and Trust Corpus included herein contain information from the Trust&#x2019;s 2025 Form 10-K.&lt;/span&gt;
  &lt;/div&gt;</us-gaap:BasisOfAccountingPolicyPolicyTextBlock>
    <us-gaap:RoyaltyTrustDistributableIncomePolicy contextRef="c0" id="ixv-1431">&lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;Producing gas and oil royalty rights -&lt;/span&gt; &lt;/div&gt;&lt;div style="text-indent: 36pt;"&gt; &lt;span&gt;The rights to certain gas and oil royalties in Germany were transferred to the Trust at their net book value by North European Oil Company (the &#x201c;Company&#x201d;) (see Note 2). The net book value of the royalty rights has been reduced to one dollar ($1) in view of the fact that the remaining net book value of royalty rights is&lt;/span&gt;&lt;span style="font-style: italic;"&gt; de minimis&lt;/span&gt;&lt;span&gt; relative to annual royalties received and distributed by the Trust and does not bear any meaningful relationship to the fair value of such rights or the actual amount of proved producing reserves.&lt;/span&gt; &lt;/div&gt;</us-gaap:RoyaltyTrustDistributableIncomePolicy>
    <us-gaap:MineralRights contextRef="c1" decimals="0" id="ixv-2582" unitRef="usd">1</us-gaap:MineralRights>
    <us-gaap:IncomeTaxPolicyTextBlock contextRef="c0" id="ixv-1450">&lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;Federal and state income taxes -&lt;/span&gt; &lt;/div&gt;&lt;div style="text-indent: 36pt;"&gt;
   &lt;span&gt;The Trust, as a grantor trust, is exempt from federal income taxes under a private letter ruling issued by the Internal Revenue Service. The Trust has no state income tax obligations.&lt;/span&gt;
  &lt;/div&gt;</us-gaap:IncomeTaxPolicyTextBlock>
    <us-gaap:CashAndCashEquivalentsPolicyTextBlock contextRef="c0" id="ixv-1458">&lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;Cash and cash equivalents -&lt;/span&gt; &lt;/div&gt;&lt;div style="text-indent: 36pt;"&gt; &lt;span&gt;Cash and cash equivalents are defined as amounts deposited in bank accounts and amounts invested in certificates of deposit and U.S. Treasury bills with original maturities generally of three months or less from the date of purchase. The investment options available to the Trust are limited in accordance with specific provisions of the Trust Agreement. &lt;/span&gt;&lt;span style="color: rgb(0, 0, 0);"&gt;In addition, the Trust held Euros 34,735, the equivalent of $40,425, in its German bank account as of April 30, 2026.&lt;/span&gt; &lt;/div&gt;</us-gaap:CashAndCashEquivalentsPolicyTextBlock>
    <us-gaap:Cash contextRef="c1" decimals="0" id="ixv-2583" unitRef="eur">34735</us-gaap:Cash>
    <us-gaap:Cash contextRef="c1" decimals="0" id="ixv-2584" unitRef="usd">40425</us-gaap:Cash>
    <us-gaap:EarningsPerSharePolicyTextBlock contextRef="c0" id="ixv-1467">&lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;Net income per unit -&lt;/span&gt; &lt;/div&gt;&lt;div style="text-indent: 36pt;"&gt; &lt;span&gt;Net income per unit is based upon the number of units outstanding at the end of the period. As of both April 30, 2026 and 2025, there were 9,190,590 units of beneficial interest outstanding.&lt;/span&gt; &lt;/div&gt;</us-gaap:EarningsPerSharePolicyTextBlock>
    <us-gaap:WeightedAverageNumberOfSharesOutstandingBasic contextRef="c0" decimals="0" id="ixv-2585" unitRef="shares">9190590</us-gaap:WeightedAverageNumberOfSharesOutstandingBasic>
    <us-gaap:WeightedAverageNumberOfSharesOutstandingBasic contextRef="c5" decimals="0" id="ixv-2586" unitRef="shares">9190590</us-gaap:WeightedAverageNumberOfSharesOutstandingBasic>
    <us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock contextRef="c0" id="ixv-1475">&lt;div style="margin-left: 36pt;"&gt; &lt;span style="text-decoration: underline;"&gt;New accounting pronouncements -&lt;/span&gt;&lt;/div&gt;&lt;div style="text-indent: 45px; padding-left: 0px;"&gt;&#160;Recent accounting pronouncements pending adoption are either not applicable or are not&#160;expected to have a material impact on the Trust&#x2019;s financial condition or results of operation.&lt;/div&gt;</us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock>
    <nrt:FormationOfTheTrustTextBlock contextRef="c0" id="ixv-1483">&lt;div&gt;
   &lt;span&gt;(2) &lt;/span&gt;&lt;span style="text-decoration: underline;"&gt;Formation of the Trust:&lt;/span&gt;
  &lt;/div&gt;
  &lt;div style="margin-left: 27pt;"&gt;&#160;
  &lt;/div&gt;
  &lt;div style="text-indent: 36pt;"&gt;
   &lt;span&gt;The Trust was formed on September 10, 1975. As of September 30, 1975, the Company was liquidated and the remaining assets and liabilities of the Company, including its royalty rights, were transferred to the Trust. The Trust, on behalf of the owners of beneficial interest in the Trust, holds overriding royalty rights covering gas and oil production in certain concessions or leases in the Federal Republic of Germany. These rights are held under contracts with local German exploration and development subsidiaries of ExxonMobil Corporation and the Royal Dutch/Shell Group of Companies. Under these contracts, the Trust receives various percentage royalties on the proceeds of the sales of certain products from the areas involved. At the present time, royalties are received for sales of gas well gas, oil well gas, crude oil, condensate, and sulfur.&lt;/span&gt;
  &lt;/div&gt;</nrt:FormationOfTheTrustTextBlock>
    <us-gaap:RelatedPartyTransactionsDisclosureTextBlock contextRef="c0" id="ixv-1499">&lt;div&gt;
   &lt;span&gt;(3) &lt;/span&gt;&lt;span style="text-decoration: underline;"&gt;Related party transactions:&lt;/span&gt;
  &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="text-indent: 36pt;"&gt; &lt;span&gt;John R. Van Kirk, the former Managing Director of the Trust, was reimbursed by the Trust for office expenses at cost. Mr. Van Kirk retired from his position of Managing Director of the Trust as of January 30, 2026. For such office expenses, the Trust reimbursed the former Managing Director $0 and $1,698 in the second quarter of fiscal 2026 and 2025, respectively. For such office expenses, the Trust reimbursed the Managing Director $3,495 and $3,651 in the first six months of fiscal 2026 and 2025, respectively.&lt;/span&gt; &lt;/div&gt;</us-gaap:RelatedPartyTransactionsDisclosureTextBlock>
    <us-gaap:CostsAndExpensesRelatedParty contextRef="c3" decimals="0" id="ixv-2587" unitRef="usd">0</us-gaap:CostsAndExpensesRelatedParty>
    <us-gaap:CostsAndExpensesRelatedParty contextRef="c4" decimals="0" id="ixv-2588" unitRef="usd">1698</us-gaap:CostsAndExpensesRelatedParty>
    <us-gaap:CostsAndExpensesRelatedParty contextRef="c0" decimals="0" id="ixv-2589" unitRef="usd">3495</us-gaap:CostsAndExpensesRelatedParty>
    <us-gaap:CostsAndExpensesRelatedParty contextRef="c5" decimals="0" id="ixv-2590" unitRef="usd">3651</us-gaap:CostsAndExpensesRelatedParty>
    <us-gaap:DefinedBenefitPlanTextBlock contextRef="c0" id="ixv-1509">&lt;div&gt;
   &lt;span&gt;(4) &lt;/span&gt;&lt;span style="text-decoration: underline;"&gt;Employee benefit plan:&lt;/span&gt;
  &lt;/div&gt;
  &lt;div&gt;&#160;
  &lt;/div&gt;
  &lt;div style="text-indent: 36pt; text-align: justify;"&gt; &lt;span&gt;The Trust established a savings incentive match plan for employees (SIMPLE IRA) that was available to employees of the Trust. As of February 28, 2026, the Trust no longer has employees eligible for the SIMPLE IRA. The Trustees had authorized the Trust to make contributions to the accounts of the employees, on a matching basis, of up to 3% of cash compensation paid to each employee for the First Quarter of 2026 and the 2025 calendar year.&lt;/span&gt; &lt;/div&gt;</us-gaap:DefinedBenefitPlanTextBlock>
    <us-gaap:DefinedContributionPlanEmployerMatchingContributionPercent contextRef="c8" decimals="INF" id="ixv-2591" unitRef="pure">0.03</us-gaap:DefinedContributionPlanEmployerMatchingContributionPercent>
    <us-gaap:DefinedContributionPlanEmployerMatchingContributionPercent contextRef="c9" decimals="INF" id="ixv-2592" unitRef="pure">0.03</us-gaap:DefinedContributionPlanEmployerMatchingContributionPercent>
    <ecd:Rule10b51ArrAdoptedFlag contextRef="c3" id="ixv-2593">false</ecd:Rule10b51ArrAdoptedFlag>
    <ecd:NonRule10b51ArrAdoptedFlag contextRef="c3" id="ixv-2594">false</ecd:NonRule10b51ArrAdoptedFlag>
    <ecd:Rule10b51ArrTrmntdFlag contextRef="c3" id="ixv-2595">false</ecd:Rule10b51ArrTrmntdFlag>
    <ecd:NonRule10b51ArrTrmntdFlag contextRef="c3" id="ixv-2596">false</ecd:NonRule10b51ArrTrmntdFlag>
    <dei:EntityCentralIndexKey contextRef="c0" id="ixv-2599">0000072633</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag contextRef="c0" id="ixv-2600">false</dei:AmendmentFlag>
    <dei:DocumentFiscalPeriodFocus contextRef="c0" id="ixv-2601">Q2</dei:DocumentFiscalPeriodFocus>
    <dei:CurrentFiscalYearEndDate contextRef="c0" id="ixv-2602">--10-31</dei:CurrentFiscalYearEndDate>
</xbrl>
