 At the time it was the western terminus of the first Berlin U-Bahn line ("Stammstrecke") after the line's extension from Knie (today Ernst-Reuter-Platz) to the Charlottenburg town hall.However, further extensions in 1908 branched off at Deutsche Oper straight westwards to "Reichskanzlerplatz" (today Theodor-Heuss-Platz) and the affluent Westend area, so the track to "Wilhelmplatz" remained a stub.In 1935 the station was renamed after the composer Richard Wagner.