[4] The last mayor works in the basilica took place after the partial collapse of the vault in 1961.

[5] Despite the 1776 reform, it is considered one of the most important examples of medieval art in Álava.

The capitals of the church are decorated with plant and animal motifs, as well as battle scenes between horsemen and centaurs.

After being dismantled, stones from the portico were embedded in the walls in a disorderly fashion: the tympanum of the Lamb and that of Christ with the Apostles and the bas-reliefs of the Harrowing of Hell and the Sepulchre of Jesus, which represents one of the best Romanesque sculptural groups in the Basque Country.

On April 28 each year, a procession and open-air festival are held on the meadows that surround the church in his honor.