In 2011, the city of Bad Homburg took over the villa that the Frankfurt banker Julius Wertheimber had built for himself at the end of the 19th century in the so-called Gustavsgarten, a landscaped park. In the course of the restoration, the later extensions were removed and the rooms carefully restored. In the summer of 2017, the city archive moved in, having previously been housed in the Gotisches Haus since 1985. It has rich holdings of the poet Friedrich Hölderlin, but some of them are stored away. In March 2021, the Hölderlin Society gave the work of Dietrich Eberhard Sattler - the editor of the Frankfurt Hölderlin edition - to the City Archive on permanent loan. Sattler's library contains 650 Hölderlin-related books, and his edition archive consists of 100 archive boxes, 45 folders and 25 files. In June 2021, a temporary exhibition area on Friedrich Hölderlin opened in the foyer.
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