He was the brother of Cosimo Fancelli and a pupil of Bernini. Notable among his works are Nile (hiding his face, since the River Nile"s source had not yet been discovered at that date) on Bernini"s Fontana dei Quattro Fiumi (completed in 1651) and Street Francis (c1647) in the church of San Bernardo alle Terme on the Quirinal in Rome.