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            <startDate>2024-06-14</startDate>
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    <dei:EntityIncorporationStateCountryCode contextRef="duration_2024-06-14_to_2024-06-14" id="ixv-277">DE</dei:EntityIncorporationStateCountryCode>
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    <dei:AmendmentDescription contextRef="duration_2024-06-14_to_2024-06-14" id="ixv-154">As previously disclosed, on January&#160;30, 2024, AVROBIO, Inc., a Delaware corporation (&#x201c;AVRO&#x201d; or the &#x201c;Company&#x201d;), entered into an Agreement and Plan of Merger and Reorganization (the &#x201c;Merger Agreement&#x201d;) by and among AVRO, Alpine Merger Subsidiary, Inc., a Delaware corporation and a wholly owned subsidiary of AVRO (&#x201c;Merger Sub&#x201d;), and Tectonic Therapeutic, Inc., a Delaware corporation (&#x201c;Tectonic&#x201d;), pursuant to which, and subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement, Merger Sub will merge with and into Tectonic (the &#x201c;Merger&#x201d;), with Tectonic continuing as a wholly owned subsidiary of AVRO and the surviving corporation of the Merger.</dei:AmendmentDescription>
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