Nicolosio's geography is noteworthy for this circular map of the world. It includes lines of latitude and longitude.

The planet's landmasses are concentrated in the upper part of the map, with much of the lower part taken up by the South Pole. The New World is not shown.

Citation: Joanne Baptista Nicolosio, Hercules Siculus, sive Studium Geographicum (Rome, 1670). Marsh's Library Exhibits ‘Mapping History’ curated by Annaleigh Margey, Jason McElligott and Sue Hemmens with Armagh Robinson Library; Held by Marsh's Library (IE-DuMAL); accessed April 26, 2024, https://www.marshlibrary.ie/digi2/exhibits/show/maps/item/457