森德灵门
The U6 is the oldest U-Bahn line of the network and also features the oldest tunnel built: the section below the Lindwurmstraße (between "Sendlinger Tor" and including the station "Goetheplatz") was already built 1938-1941 as part of a planned S-Bahn network. For this reason "Goetheplatz" has a platform longer than the standard . Today the line has a length of . Its signature colour is blue.