Frank R Werner was professor of history and theory of architecture at the Staatliche Akademie der Bildenden Künste Stuttgart from 1990 to 1993, since 1993 he has been director of the Institut für Architekturgeschichte und Architekturtheorie at the Bergische Universität in Wuppertal. He studied painting, architecture and architectural history in Mainz, Hanover and Stuttgart.

Christian Richters studied communication design at the Institut für Architekturgeschichte und Architekturtheorie at the Bergische Universität in Wuppertal. Christian Richters studied communication design at the Folkwangschule in Essen. He is one of the most sought-after architecture photographers in Europe. To date he has been represented in the Opus series by nine volumes, including ones about the embassies of the Nordic countries and the Bode Museum in Berlin, the Nieuwe Luxor Theater in Rotterdam and the BMW Welt in Munich.