Professional Football Club Slavia Sofia was founded in April 1913 by a group of young people from the city. Over the years, they have achieved significant success at domestic level and are one of Bulgarian football's most successful clubs. The team's original home kit was a white shirt and black shorts, but since 1924 they have played in all-white. As a result, the team are nicknamed 'The White Avalanche'.
After establishing themselves within the country, the club went on to achieve notable success in the league. The most successful period in Slavia Sofia's history came prior to the end of the Second World War. Their first league title win was achieved in 1928 and additional titles followed in 1930, 1936, 1939, 1941 and 1943, taking their total haul to six.
In the years that followed, Slavia's league dominance subsided, although they were able to win the Bulgarian Cup in 1952, 1963, 1964, 1966, 1975 and 1980. During this period, the team also made its mark on the international scene, reaching the semi-finals of the UEFA Cup Winners' Cup and winning the Balkans Cup in 1986 and 1988. Then, the 1995-96 season brought about huge success for the side, as they won their first league title in over 50 years and lifted the Bulgarian Cup in the same year, completing a domestic double.
Andrey Zhelyazkov is one of the club's best-known former players and he holds the team records for most goals and most appearances. Other notable alumni include Dobromir Tashkov, Bozhidar Grigorov and Aleksandar Vasilev.
Slavia Sofia's home matches are held at Ovcha Kupel Stadium, which is better known as Slavia Stadium. The venue, which also hosts the Bulgaria under-21 team's home matches, was built in 1930 and was renovated several times in the late 1990s and early 2000s. It is currently able to hold up to 18,000 supporters.