They cover a vast range of subjects from religious studies to mathematics, medicine and astronomy, music, literature, poetry, architecture and esoteric practices, and bear witness to the rich history of the city as a cultural crossroads and centre of learning.
An entire wall is covered by Rivera's El Hombre en la Cruce de Caminos (Man at the Crossroads), originally commissioned for New York City's Rockefeller Centre but destroyed because of its communist and anti-capitalist themes.