This is the original nucleus of the Monastery. The flat cloister vaults covering it and their irregular sizes make it special in the context of Mudéjar buildings in Seville. The construction of the Refectory (nº 7) made it smaller and a square chapel was added to it, where the mortal remains of the Monastery's founder, Archbishop Gonzalo de Mena, were finally laid. The walls conserve a representation of the triple Saint Anne (Saint Anne, Mother of the Virgin, holds Mary in her lap and she, in turn, holds her Son, Jesus).