Troia Cathedral is the cathedral of Troia in Apulia, Italy, dedicated to the Assumption of the Blessed Virgin Mary. Built in the first quarter of the 12th century, it is reckoned a masterpiece of Apulian Romanesque architecture and is particularly noted for the rose window and the bronze doors of the west front. Formerly the seat of the Bishops of Troia, it is now a co-cathedral in the diocese of Lucera-Troia.