This imposing Gothic cathedral consists of 3 naves, a polygonal apse and monumental dome. Construction began in 1262 and finished in 1702, though before it was a cathedral, it had been a mosque and a Roman temple. The cathedral's three doors reflect the mixture of styles: the Palau (palace) door is archaic Romanesque mixed with primitive Gothic; the Door of the Apostles is pure Gothic, and the Hierros Door is Baroque. Every Thursday at midday, the Door of the Apostles is the site of the oldest tribunal in all of Europe, the Tribunal de las Aguas (Water Court), which resolves the conflicts arising over the use of water in the nearby fields. Another outstanding feature is the Gothic bell tower, known as the Miguelete, which you can visit. The cathedral also houses the Catedralicio Diocesano Museum and the Santo Cáliz Chapel.