Iglesia de San Vicente Mártir

The church of San Miguel Arcángel is a Gothic-Renaissance temple built mainly in the 14th century. The oldest part dates from the end of the 14th century and the beginning of the 15th century and includes the portal, the best-preserved part of which is the tympanum in three parts. Later, in the 15th century, in the Basque Gothic style, the round columns with collared capitals, the vaults and the Puerta del Solar were built. The most outstanding part of the interior is undoubtedly the main altarpiece, a magnificent early Baroque work by Gregorio Fernández, who executed it between 1624 and 1632.

The church of San Pedro Apóstol is a 14th-century Gothic church. The tower is Baroque, with a 17th-century cube and an 18th-century spire, the work of Valerio de Ascorbe, very similar to the tower of the neighbouring church of San Miguel Arcángel. Between 1892 and 1896, it was restored and the neo-Gothic portico on the south side remains, the work of the Vitorian architect Fausto Íñiguez de Betolaza. The stained glass windows, made in Bordeaux by the Dagrant company, were installed between 1861 and 1901.

The Cathedral of Santa María, popularly known as the Old Cathedral, is a Gothic Catholic temple built from the 13th century. Since 2015 the building is a UNESCO World Heritage monument as part of the "Camino de Santiago: French Road and Northern Roads of Spain".