Lorenzo Valla (Italian: [loˈrɛntso ˈvalla]; also Latinized as Laurentius; c. 1407 – 1 August 1457) was an Italian Renaissance humanist,[1] rhetorician, educator and scholar. He is best known for his historical-critical textual analysis that proved that the Donation of Constantine was a forgery, therefore attacking and undermining the presumption of temporal power claimed by the papacy.[1] Lorenzo is sometimes seen as a precursor of the Reformation.[2][3]