The Chicago Bulls are an American professional basketball team based in Chicago. The Bulls compete in the National Basketball Association (NBA) as a member of the league's Eastern Conference Central Division. The team was founded on January 16, 1966 and played its first game during the 1966–67 NBA season. The Bulls play their home games at the United Center, an arena on Chicago's West Side shared with the Chicago Blackhawks of the National Hockey League (NHL). The Bulls saw their greatest success during the 1990s when they played a major part in popularizing the NBA worldwide. The Bulls are the only NBA franchise to win multiple championships while never losing an NBA Finals series in their history.