On the Divine Institution of The Papacy
Tommaso de Vio Cajetan (1469–1534)
De divina institutione pontificatus Romani pontificis super totam ecclesiam, a Christo in Petro
First published 1521
In this treatise, Cardinal Cajetan examines the foundations of the Catholic Church and the authority of the papacy, arguing against conciliarism and addressing the question of a heretical pope.