Peter's Rock in Mohammed's Flood, from St. Gregory the Great to St. Leo III

A Key to the Knowledge of Church History (Ancient)

Christianity and Islam

Crises in the History of the Papacy A study of twenty famous popes whose careers and whose influence were important in the development of the church and in the history of the world

Curiosities of Christian History Prior to the Reformation

History of the Waldenses

Il nipotismo di Roma, or, The History of the Popes Nephews from the time of Sixtus IV. to the death of the last Pope, Alexander VII