Casa Pia AC is a historic soccer club based in Lisbon, Portugal. Founded in 1920, the club has a rich history and is one of the oldest in the country. Casa Pia AC has primarily competed in the lower divisions of Portuguese football, with occasional appearances in the top-flight. The club's home venue is the Estádio Pina Manique, located in the Lisbon district of Campo de Ourique. Casa Pia AC is known by its nickname "Os Gansos" which translates to "The Geese" in English. The nickname is believed to have originated from the club's early days when geese were kept on the premises. Despite not having major accomplishments at the national level, Casa Pia AC holds a special place in Portuguese football history due to its longevity and contribution to the sport.