The Sanctuary of Atotonilco is a church complex and a World Heritage site. The complex was built in the 18th century by Father Luis Felipe Neri de Alfaro. The main feature of the complex is the rich Mexican baroque mural work that adorns the main nave and chapels. This was chiefly the work of Antonio Martínez de Pocasangre over a period of thirty years. The mural work has led the complex to be dubbed the "Sistine Chapel of Mexico."