Blau-Weiß 1890 Berlin
Sp.Vg. Blau-Weiß 1890 Berlin, mostly referred to as Blau-Weiß 90, was a German association football club based in Mariendorf, a district of Berlin. The club was formed on 27 July 1927 from the merger of Berliner FC Vorwärts 1890  (November 1890), German championship runner-up of 1921, and Berliner Thor- und Fussball Club Union 1892 (BTuFC Union, June 1892), German champions of 1905. Blau-Weiß 90 spent one season in the German first division, the Fußball-Bundesliga.