Prospero Piatti (c. 1842 – 15 July 1902) was an Italian painter known for depiction of Neo-Pompeian and sacred subjects.
As a boy, his family had moved to Rome and he learned his trade with Alessandro Mantovani, who was engaged in frescoing loggias of the Vatican.
He then studied at the Accademia di San Luca with Tommaso Minardi and, for a year, with Friedrich Overbeck.
In 1865, he gained one of the commissions to decorate San Paolo fuori le Mura, specifically the chapel of the choir, where he depicted the Life of Pope Gregory VII.
[4] He painted two large canvases: Funerals of Caesar and Cato departs from the Theater during Floralia (1900), now on exhibit in the Sala de Prensa Fray Camilo Henríquez, Biblioteca Nacional of Chile.