The Castell del Patriarca (English for: Patriarch's castle) was a castle that was in the city of Tarragona (Spain). Located from the street Mercería covered up much of the streets of Cocas, de San Lorenzo and the Nueva del Patriarca descent. Its construction was begun in the 12th century by Archbishop Bernat Tort, who built up the height of the second floor, and was completed by the Archbishop Bernat de Olivella in the 13th century. The result was a manor fortress in which lived all the prelates of the Tarraconense headquarter until the early 19th century, when Archbishop Romuald Mon moved to the new palace during his prelature.