One of the oldest major structures at Chichén Itzá, the Nunnery complex was constructed over several centuries, with its most active development occurring between AD 600 and 900. On the left is a structure known as La Iglesia (‘the Church’), whose frieze displays one of the masks adorning the building, representing Chaac, the rain god, identified by his distinctive coiled nose. On the right is Casa de las Monjas (‘the Nunnery’), an elite residential and administrative complex rather than a convent, often described as a palace. These buildings combine elements of both the Puuc and Chenes architectural styles, and many structures at Chichén Itzá were named during the Spanish colonial period..