Prehistoric research began at the end of the 19^th century under the impetus of Father Godefroy Zumoffen (1948-1928), the pioneer of Lebanese prehistory. Zumoffen was followed by other Jesuit scholars: Raoul Desribes (1856-1940), Paul Bovier-Lapierre (1873-1950), Auguste Bergy (1973-1955), Maurice Tallon (1906-1982), Henri Fleisch (1904-1985) and Francis Hours (1921-1987). They crossed Lebanon searching for remains testifying to the life of Stone Age men. Thanks to the work of these pioneers, we know a large number of prehistoric sites in Lebanon, some of which have disappeared. They gathered a huge collection kept at the Museum of Lebanese Prehistory.