The Nunnery, so-called by the Spanish as they felt it resembled the convents of Spain, is now thought to have been used for governmental purposes It features carved stone latticework and Chaak masks decorating the upper facades and corners of buildings. The Nunnery, so-called by the Spanish as they felt it resembled the convents of Spain, is now thought to have been used for governmental purposes It features carved stone latticework and Chaak masks decorating the upper facades and corners of b