The Pantheon or Hall of Tombs, was built by Abbot Manuel de Mendonça (18th century) for the tombs that had been in the transept since the disappearance of the galille in the time of King Afonso II (13th Century). This contains the tombs of Urraca, wife of King Afonso II, Beatriz wife of King Afonso III, her sons Fernando, Vicente and Sancho, and three tombs which are unidentified.