After the expulsion of the Jesuits from Spanish colonies (1767), he went to Italy, where he wrote a valuable work on the pre-Columbian history and civilizations of Mesoamerica and the central Mexican altiplano.
Setelah pengusiran para Yesuit dari koloni-koloni Spanyol (1767), ia datang ke Italia, dimana ia menulis karya berharga tentang sejarah dan peradaban pra-Kolumbus Mesoamerika dan altiplano Meksiko tengah.