The yellow-and-white Catedral San Miguel Arcángel dates from 1588 in its earliest form, though most of what stands today is from a 1660s rebuild after earthquake damage. The bell tower is a later addition from the early twentieth century.
Inside, the great draw is the gold-leaf altar of the Virgen de Fátima — a baroque masterwork hand-carved by the Spanish craftsman Julián Alagón and gilded in the seventeenth century. The pulpit, also baroque and heavily gilded, was carved by the same hand. The cool, dim interior is a welcome refuge from the hot plaza outside.