Giuseppe Barilli (20 April 1812 – 18 December 1894), also known by his pseudonym Quirico Filopanti, was an Italian mathematician and politician.

He was appointed secretary of the Assemblea Costituente (constituent assembly) and was the author of the Decreto Fondamentale ("Fundamental Decree") which on 9 February 1849 declared the temporal government of the Pope forfeited and proclaimed the Republic.

Filopanti's hypothesis was to ideally divide the Earth's surface into 24 areas (zones) along the lines of the meridians, each of which should have its own time.

His hypothesis provided also for the establishing of a universal time (U) that should be used as only datum line in astronomy and telegraph communications.

A Book Divided Into Three Parts, Entitled Souls, Numbers, Stars, on the Neo-Christian Religion, London, 1858, was listed by Augustus De Morgan in his A Budget of Paradoxes.