Which Italian Catholic priest and Renaissance humanist  is best known for his textual analysis that proved that the Donation of Constantine was a forgery?
Donation of Constantine:  Lorenzo Valla, an Italian Catholic priest and Renaissance humanist, is credited with first exposing the forgery with solid philological arguments in 1439–1440, although the document's authenticity had been repeatedly contested since 1001. Lorenzo Valla: Lorenzo (or Laurentius) Valla (] ; 14071 August 1457) was an Italian humanist, rhetorician, educator and Catholic priest. Lorenzo Valla:  He is best known for his textual analysis that proved that the Donation of Constantine was a forgery.
Lorenzo (or Laurentius) Valla