Don Antonio and Bishop Juan de Zumárraga were key in the formation of two institutions of Mexico: the Colegio de Santa Cruz at Tlatelolco (1536), where the sons of Aztec nobles studied Latin, rhetoric, philosophy and music, and the Royal and Pontifical University of Mexico (1552), modeled on the University of Salamanca, which trained young men for the Catholic Church. These institutions were the first and second universities respectively to be established in the mainland of the Americas. In 1536 he began the minting of silver and copper coins, known as "macuquinas". Also under his instructions, the first printing press in the New World was brought to Mexico in 1539, by printer Juan Pablos (Giovanni Paoli). The first book printed in Mexico: "La Escala Espiritual de San Juan Clímaco". On May 18, 1541 don Antonio founded the city of Valladolid (now Morelia, Michoacán).