At the end of the 19th century, the decision was taken in Berlin to build a new rapid transit rail system and various proposals were submitted for its implementation. In addition to the U-Bahn system of Siemens, which was eventually built, the idea of a monorail, as had already been built for example in Wuppertal, was also proposed.
In the late 19th century, Berlin decided to build a new rapid transit rail system and several proposals were submitted for its construction.  Besides the U-Bahn system by Siemens, which ultimately came to fruition, the idea of a monorail, as seen in Wuppertal, was also put forward.