The term Brick Expressionism is used to describe a technique used most predominantly in Germany during the 1920s, using brick as a decorative material as well as a structural one. Developed during the same time period as Bauhaus, where all ornamentation was removed, expressionist architecture showed what could be achieved using a very plain construction material. Above shows the Reemtsma Cigarette Factory by Fritz Höger where the rotation of rectangular bricks creates a beautiful spiral column. More examples can be found here, including the Fernmeldeamt which is a great example of industrial styled architecture with intricate facade details.