Columbia subject headings:
Frankfurt am Main (Germany)--Buildings, structures, etc.
Portikus (Gallery)
Prof. Christoph Mäckler Architekten.
Harvard subject headings:
Art museums--Germany--Frankfurt am Main--Design and construction.
Convention facilities--Germany--Frankfurt am Main--Design and construction.
Exhibition buildings--Germany--Frankfurt am Main.
Mäckler, Christoph, 1951-
Portikus (Gallery)
Princeton subject headings:
Frankfurt am Main (Germany)--Buildings, structures, etc.
Portikus (Gallery)
Prof. Christoph Mäckler Architekten.