The legendary Cabaret Fledermaus (1907–1913) in Vienna was renowned for its pioneering artistic design and program that were in line with Wiener Werkstätte’s idea of the Gesamtkunstwerk. In 2019, in the context of an international collaborative effort, the Collection and Archive of the University of Applied Arts Vienna was able to produce a stylistic reconstruction of the cabaret’s celebrated bar room. In 2020, the artist group Bar du Bois developed the exhibition unter flaschen. Die Fledermaus in der Bar du Bois. This publication documents both the rediscovery of a legendary site of Viennese Modernism as well as what has effectively been its twofold “resurrection.”