Fornari, Niccolo an Italian prelate, was born at Rome, January 23, 1788. He studied with ardor, was received into orders, and devoted himself to instruction in theology. Pope Gregory XVI made him nuncio to Brussels. He was afterwards appointed a chief commissioner of the congregation of studies. Fornari was made cardinal in petto, December 21, 1846, and proclaimed as such September 30, 1850. He was for some time papal nuncio at Paris, where he died, June 15, 1856. See Hoefer, Nouv. Biog. Generale, s.v.