AS Saint-Étienne is a professional football club based in Saint-Étienne, France. Founded in 1919, the club is known for its green colors and passionate fan base. They play their home matches at the Stade Geoffroy-Guichard, which has a capacity of around 41,000 spectators. The team has a rich history, having won numerous domestic titles, including ten Ligue 1 championships, making them one of the most successful clubs in French football. AS Saint-Étienne has also had notable success in European competitions, particularly during the 1970s when they reached the European Cup final.