Construction plan, November 1926, signed by Engelmann and Wittgenstein, Courtesy of Baupolizei, Rathaus Wien

Construction plan, November 1926, signed by Engelmann and Wittgenstein, Courtesy of Baupolizei, Rathaus Wien

Construction plan, November 1926, signed by Engelmann and Wittgenstein, Courtesy of Baupolizei, Rathaus Wien

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