This palace is located behind the luxuriant oak grove of San Lourenzo and was commissioned by Martín Arias, the bishop of Zamora, in the 13th century. It was occupied by Franciscans and in the 11th century it was acquired by the Count and Countess of Altamira, who used it as a residence. The count and countess were the ones who brought the beautiful marble altarpieces, made by Carrara in the 16th century, from Seville's Convent of San Francisco to the palace. Despite numerous alterations, the Romanesque naves of the original building still exist. It is presently used as a catering establishment.