The Switzerland Super League, also known as the Raiffeisen Super League, is the top professional football league in Switzerland. It was founded in 1897, making it one of the oldest football leagues in Europe. The league consists of 10 teams, with each team playing a total of 36 matches throughout the season. Grasshopper Club Zurich and FC Basel are the most successful teams in the league's history, having won the title multiple times. An interesting fact about the league is that it has a unique promotion and relegation system, with the bottom team being automatically relegated to the Challenge League, the second tier of Swiss football.