The Diocese of Faro, also called the Diocese of the Algarve and formerly the Diocese of Silves, is a Latin Church diocese of the Catholic church in Portugal. It is a suffragan of the archdiocese of Évora. The current bishop of Faro is Manuel Neto Quintas.

The siege of Silves was an action of the Third Crusade and the Portuguese Reconquista in 1189. The city of Silves in the Almohad Caliphate was besieged from 21 July until 3 September by the forces of Portugal and a group of crusaders from northern Europe on their way to the siege of Acre. The defenders capitulated on terms, the city was handed over to Portugal and the crusaders took a portion of the spoils.