The Monastery of Saint Catherine is a monastery of nuns of the Domincan Second Order, located in Arequipa, Peru. It was built in 1580 and was enlarged in the 17th century. The over 20,000-square-meter monastery was built predominantly in the Mudéjar style, and is characterized by its vividly painted walls. There are approximately 20 nuns currently living in the northern corner of the complex; the rest of the monastery is open to the public.