A small chapel in the nave of the Epistle Side. It contains the oldest paintings of the Seu, dating back to the first third of the 13th century. In terms of its iconography, two different themes converge: first, a Maiestas Mariae accompanied by the apostolic college and an Agnus Dei, located at the top; secondly, a decoration with a Mudejar interlacing geometric motif at the bottom.