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Garden of the Kroll Opera Building Berlin . Der Garten der Krolloper am Knigsplatz heute Platz der Republik in BerlinTiergarten The garden of the Kroll Opera Building on Knigsplatz now Platz der Republik in Tiergarten district Berlin Collection of the Technical University of Berlinbr Scanned from Janos Frecot Helmut Geisert Berlin