The omnipresent stack of deity masks marks the southern end of the Nunnery's west building. Its frieze displays scrollwork and other motifs that recall the frieze at the House of the Governor. While not easily visible from this angle, two intertwining stone serpents wind through much of the scrollwork, up to the upper cornice, down behind stone masks and along the lower cornice before disgorging a human head (see photo #18), in a motif seen elsewhere in the Maya area in relation to the conjuring of deities and ancestors. This might be an indication as to the original function of the building, where rites of conjuring and divination may have once taken place.