The Secretariat of Public Education Main Headquarters building is on the northeast corner of San Ildefonso and Republica de Argentina streets in the historic center of Mexico City, and used to be part of the largest and most sumptuous convents in New Spain. It was secularized in the 19th century and then taken over by the then-new Secretariat of Public Education after the Mexican Revolution in the early 20th century. The new agency did extensive remodeling work on the building, including covering nearly all the walls of the two inner courtyards with murals. These murals include Diego Rivera’s first large-scale mural project, which he completed in 1928.