Peter Kolosimo, pseudonym of Pier Domenico Colosimo (15 December 1922 – 23 March 1984), was an Italian journalist and writer.
He is ranked amongst the founders of pseudoarchaeology (in Italian: fantarcheologia), a controversial topic where interpretations of the past are made that are not accepted the archaeological science community, which reject the accepted datagathering and analytical methods of the discipline.
He also popularised ancient astronaut theories of contact between extraterrestrial beings and ancient human civilizations.