Saint-Apollinaire Cathedral is a Romanesque cathedral, which was built in the 11th century. It was the Bishop Gontard (1063–1099) who drove construction of this edifice which is now the oldest in the city. Several blocks of stone from the Saint-Apollinaire Cathedral were reused from the Gallo-Roman buildings of the city of "Valentia". The Cathedral of St. Apollinaris, which has an architecturally notable apse, and was consecrated in 1095 by pope Urban II. It suffered extensive damage in the French Wars of Religion, but it was restored in the first decade of the 17th century. The porch and the stone tower above it were rebuilt in 1861. The church contains the monument of Pius VI, who died at Valence in 1799. The library and the museum containing Roman antiquities, sculptures, and a picture gallery are housed in the old ecclesiastical seminary.