In 1906–1908 Hans Poelzig designed a plant on Kepa Mieszczanska in Wrocław upon request of a trader involved in trading coal and building materials. The design was intended to establish a complex consisting of two buildings with different heights, connected by suspended glass passages. The buildings established on concrete foundation were supposed to be made of brick, and the passages of the steel structure were supposed to be glazed. In order to make the inside of the plant lighter in one of elevations the architect applied completely glazed suspended walls with an analogical structure. Poelzig shaped the entire building in a sculptural manner, contrasting tectonics of the buildings with a glass passage and suspended walls. The suspended walls constituted a declaration of a so-called curtain wall, the main motif of avant-garde architecture of the 20s and 30s of the 20th century. This element in the design by Poelzig fascinated Walter Gropius, who applied and fully developed the idea of a glass corner without any supports in Faguswerke plant in Alfeld an der Leine which was built several years later.