It is a cloister with about 55 meters of side, 4 galleries and 7 sections in each, plus 4 common to the angles. It is initially Gothic in construction and has only one floor, as was the custom at that time, which makes the roof also serve as terraces that run through all the galleries. It is covered by cross vaults and in the part facing the center, it has large buttresses topped with gargoyles. This cloister was started on a par with the church, by Afonso Domingues in the last years of the 14th century and continued, from 1402, by Huguet. The whole part of roofs with thin ribbed vaults is by Master Huguet. The flags of the arcades of this cloister with complex geometric compositions, shapes of the vegetal world, and Manueline symbols (Cruz de Cristo and armillary sphere) are the work of Mateus Fernandes during the reign of D. Manuel I.