The Bulgarian Football League, officially known as the First Professional Football League, is the top tier of professional football in Bulgaria. Established in 1924, it features clubs from across the country competing for the championship title. The league operates on a system of promotion and relegation with the Second Professional Football League. The season typically runs from July to May, with each team playing 26 matches. The league is known for its passionate fan base and has produced several notable clubs, including CSKA Sofia and Levski Sofia, which have a rich history in both domestic and European competitions.