Valencia's 13th- to 15th-century cathedral is the heart of the city. The building has three portals—Romanesque, Gothic, and rococo. Inside, Renaissance and baroque marble was removed to restore the original Gothic style, as is now the trend in Spanish churches. The Capilla del Santo Cáliz (Chapel of the Holy Chalice) displays a purple agate vessel purported to be the Holy Grail (Christ's cup at the Last Supper) and thought to have been brought to Spain in the 4th century.
Behind the altar you can see the left arm of St. Vincent, who was martyred in Valencia in 304. Stars of the cathedral museum are Goya's two famous paintings of St. Francis de Borja, Duke of Gandia. To the left of the cathedral entrance is the octagonal tower El Miguelete, which you can climb (207 steps) to the top: the roofs of the old town create a kaleidoscope of orange and brown terra-cotta, with the sea in the background. It's said that you can see 300 belfries from here, many with bright-blue cupolas made of ceramic tiles from nearby Manises. The tower was built in 1381 and the final spire added in 1736. The Portal de los Apostoles, on the west side of the Cathedral, is the scene every Thursday at noon of the 1,000-year-old ceremony of the Water Tribunal: the judges of this ancient court assemble here, in traditional costume, to hand down their decisions on local irrigation rights disputes.