 The Chapel of Our Lady of Guadalupe ( Spanish : Capilla de Nuestra Señora de Guadalupe ) was built in 1660 . It was the first baptistery of the cathedral and for a long time was the site for the <unk> of the Most Holy <unk> , which had many powerful benefactors . It is decorated in a 19th century neo @-@ classic style by the architect Antonio Gonzalez <unk> , director of the Academy of San Carlos . The main altarpiece is dedicated to the Virgin of Guadalupe and the sides altars are dedicated to John the Baptist and San Luis <unk> respectively . 
