Club Social y Deportivo Colo-Colo is a Chilean football club based in Macul, Santiago. Founded in 1925, they play in the Primera División (top-tier), from which they have never been relegated. The team plays its home games at the 47,000 seat Estadio Monumental since 1989. Colo-Colo is regarded as the most successful club of Chilean football.
Colo-Colo has won more League titles (31) than any other Chilean club and a record ten Copa Chile titles. It was the first Chilean team to win a continental tournament conquering the 1991 Copa Libertadores (which it failed to win in 1973) after beating Olimpia 3–0 on 5 June with Mirko Jozić as manager. In 1992, the club went on to win two international titles that were Recopa Sudamericana and Copa Interamericana, completing the club's three international honours.
The club's most-winning player is Luis Mena with eleven titles, the historic top-scorer is Carlos Caszely with 208 goals, and the player with most appearances is the former goalkeeper Misael Escuti with 417 games. Colo-Colo is the team with most supporters in Chile, and holds a long-standing rivalry with Universidad de Chile. The club also holds a traditional rivalry in matches against Cobreloa and Universidad Católica. The IFFHS placed the team into the top-30 club ranking in 2007. In 2009, that same institution named the team as the 20th century's top club of its country, and also within the top twenty clubs in South American football history.