Originally built in 1922 as a convent, this building became the home of the Secretary of Public Education in 1922 and was decorated with a great series of more than 200 Diego Rivera murals, dating from 1923 and 1928, that cover over 1,500 sq. m (16,146 sq. ft.) of wall space. Other artists did a panel here and there, but the Rivera murals are the most outstanding.