The lecture by architects Miloš Klement and Ivan Wahly will focus on the development of designs for individual Wiesner buildings. By comparing preserved plans from various stages of construction, they will attempt to deduce how Ernst Wiesner architecturally thought through his projects. The highlight of the lecture is the development of the designs for the Neumark villa and the Haas villa from November 1928 to spring 1929. It is interesting to compare this with the Tugendhat villa, which also underwent significant changes during the same period of construction. Comparing Wiesner's villas with the villas of Erich Mendelsohn, Bruno Paul, and Mies van der Rohe deepens the discussion about the architectural art of this significant Brno architect.