On the highest point in Huesca, occupying the site of an earlier mosque, stands the Gothic cathedral (13th-16th centuries), which has a beautiful main doorway (14th century) with rich figural decoration and a rose window in the apex of the arch. The most notable feature in the interior is the magnificent alabaster high altar, the masterpiece of Damián Forment, on which he worked for thirteen years (1520-33). The beautiful reliefs in the middle register depict three scenes from Christ's Passion, and the sculptor has immortalized himself and his daughter in medallions at the end of the lowest row. Also notable are the Renaissance choir-stalls (c. 1590), the cathedral treasury in the sacristy and the chapel of Santa Ana, with a retablo attributed to Alonso de Berruguete.