U1 (Berlin U-Bahn)
Berlin U-Bahn line
U1 is a line on the Berlin U-Bahn, which is 8.8 kilometres (5.5 mi) long and has 13 stations. Its traditional line designation was BII. It runs east–west and its eastern terminus is Warschauer Straße S-Bahn station where it connects to the Schlesische Bahn. From there it runs through Kreuzberg via Gleisdreieck and Wittenbergplatz on to the Kurfürstendamm.
The eastern section of the line is the oldest part of the Berlin U-Bahn, although it is largely above ground.
Nomenclature
The U1 route was originally part of BII until 1957, where it was renamed to BIV until 1 March 1966. While the main section between Wittenbergplatz and Schlesisches Tor has been designated as line 1 since 1966, the western end of the line has changed twice. It was consequently renumbered to Line "3" and "U3" in 1993, before being renamed U15 until 2004.
History
The increasing traffic problems in Berlin at the end of the 19th century led to a search for new efficient means of transport. Inspired by Werner von Siemens, numerous suggestions were made for overhead conveyors, such as a suspension railway, as was later built in Wuppertal, or a tube railway as was built in London. Finally Siemens and some prominent Berliners submitted a plan for an elevated railway on the model of New York.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 13, 2026. The linked authority identifier is Q99691. 1 of 3 selected statements include explicit references; 1 carry qualifiers and 1 use preferred rank. The first chronological checks are 1957, 1966, 1993 and 2004.
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This entry incorporates text from “U1 (Berlin U-Bahn)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.