Wiedermann was probably insired by Erich Mendelsohn's department store Petersdorff (Kameleon today) in Wrocław. One of the striking details are the ribbon windows at the corner of the second and third floor, forming a semi-circle oriel. The horizontally emphasized plastered areas between the rows of windows are contrasted by several horizontal areas, such as the tower-like part on the far left and decorative lines near the oriel and the staircase zone on the far right.
Franz Schubert's initials FS are still visible at the entrance of the street 11 Listopada.
A project drawing and photo from 1938 are on this website.