Fotbal Club FCSB, formerly Fotbal Club Steaua București, is a Romanian professional football club based in Bucharest. Founded in 1947 as Asociația Sportivă a Armatei București, it has spent its entire history in the Liga I, the top tier of the Romanian football league system.
The team was initially part of the CSA Steaua București sports club and belonged to the Romanian Army. In 1998, the club and facilities were separated from the armed forces and sold to a group of shareholders in a post-Ceaușescu privatization scheme, subsequently leading to one of the shareholders acquiring full ownership five years later. However, the same Army sued the football club in 2011; the club has since been in a legal conflict regarding the ownership of the Steaua brand and honours, which resulted in multiple court cases and the change of the name to FCSB in early 2017.
Domestically, the club have won Liga I 26 times, Cupa României 22 times, Cupa Ligii 2 times and Supercupa României 6 times—all competition records. Internationally, they have won the European Cup and European Super Cup, both in 1986. They reached the European Cup final once again in 1989, when they were defeated by A.C. Milan.