Most Popular Books
- Die römischen Päpste, ihre Kirche und ihr Staat im sechzehnten und siebzehnten Jahrhundert
- The History Of The Popes: Their Church And State, And Especially Of Their Conflicts With Protestantism In The Sixteenth & Seventeenth Centuries, Volume 2
- History of the Popes, Volume I: Their Church and State
- The History of the Popes, Their Church and State; Volume III
