Our third video. We discuss the Pseudo-Symmachian Forgeries, the early parts of the Liber Pontificalis, the Constitutum and Donatio Constantini, and finally, the massively influential Pseudo-Isidore Decretals, the fake canons of which provided the legislation necessary for the intervention of Pope Nicholas during the Photian Schism. We then go on to discuss the influence these Forgeries had on the Gregorian Reforms, the Decretum Grantiani, Thomas Aquinas, the Council of Florence, and even the modern Catechism of the Catholic Church.