Contents 15th century Italian manuscript of Thomas Aquinas's Summa contra Gentiles, also known as Liber de Veritate Catholicae Fidei contra Errores infidelium, among other names, originally written during circa 1259-1265. A theological treatise devoted to explaining core beliefs of the Catholic faith to infidels, and to providing a philosophical defense for arguments against the doctrine. This copy was done in Vigevano, Italy, by the...