Karlsplatz is a station on U1 and U4 of the Vienna U-Bahn.^[1] It is located in the Innere Stadt District. It first opened on June 30, 1899, as the Academiestrasse station of the Wiener Stadtbahn, and received its current name in the same year that the associated square was named after Karl VI. At the same time, the company abbreviation changed from AK to KP. After the cessation of steam operation in 1918, the Wiener Elektrische Stadtbahn operated as a replacement from 1925. Upon the commissioning of the first subway section of the U1 from Reumannplatz on February 25, 1978, Karlsplatz also became an underground station and, after the platforms on Line U4 opened in 1980, is now the largest transport hub for Wiener Linien.

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  U1 platform
• 
  U4 platform

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Karlsplatz
General information
Location	Innere Stadt, Vienna Austria
Coordinates	48.2007°N 16.3689°E / 48.2007; 16.3689
Line(s)
History
Opened	25 February 1978
Services
Preceding station Wiener Linien Following station Taubstummengasse toward Oberlaa U1 Stephansplatz toward Leopoldau Kettenbrückengasse toward Hütteldorf U4 Stadtpark toward Heiligenstadt

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The following art is found in the station.

• "Pi" by Ken Lum.
• Rauminstallation by Peter Kogler
• Fries "Unisono di colori" by Ernst Friedrich and Eleonor Friedrich