Faculty of Architecture and Landscape Colour Research & Theory Collection Collection of Architectural Drawings and Prints Wilhelm Ostwald, Doppelkegel (Nachbau), 1923 (TU Dresden, Sammlung Farbenlehre) © Kirsten Lassig F. Borowski, Skizzenbuch, a1901/2 (TU Dresden, Architekturplansammlung) © TU Dresden, Kustodie