Despite his noble status Monti never held public office, but instead occupied himself with scholarship, particularly history and geography, with administering the family property, and with philanthropic endeavors.

He died in Milan on 15 May 1613 and was buried in the family chapel in the church of San Carlo al Corso.

[1] Monti's most famous work is a large-scale world map accompanied by a multi-volume treatise on geography and cosmology.

The map reflects the geographical knowledge of his time, but in some ways it is surprisingly advanced.

[2] His depiction of Japan is particularly detailed and contains many place names not present on other Western maps of the time.