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File:Kaisersaal Frankfurt am Main, Nr. 11 - Otto III., (Joseph Anton Settegast).png - Wikimedia Commons
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File:Kaisersaal Frankfurt am Main, Nr. 10 - Otto II., (Adolf Friedrich Teichs).png - Wikimedia Commons
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06 November 2021, Hessen, Frankfurt/M.: Entrepreneur Frank Otto walks the red carpet at the 39th German Sports Press Ball at the Alte Oper in Frankfurt. Photo: Thomas Frey/dpa Stock Photo - Alamy
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