The Bulgarian First League, also known as Parva Liga, is the top professional football league in Bulgaria. It was established in 1924, making it one of the oldest football leagues in Eastern Europe. The league has seen several dominant teams over the years, with CSKA Sofia and Levski Sofia being the most successful, having won the league title numerous times. The competition structure consists of 14 teams, who play each other twice in a round-robin format. An interesting fact is that the league has a rich history of producing talented players who have gone on to have successful careers in top European leagues.