On the Donation of ConstantineLorenzo Valla (14071457) was the leading theorist of the Renaissance humanist movement and the author of major works on Latin style, scholastic logic, and other topics. In On the Donation of Constantine he uses new philological methods to attack the authenticity of the most important document justifying the papacy's claims to temporal rule, in a brilliant analysis that is often seen as marking the beginning of modern textual criticism. Widely