- A History of Modern Europe from the Fall of Constantinople to the War of Crimea A.D. 1453-1900, Vol. I: 1453-1525
- The History of the Kings of Rome (Kennikat classics series)
- Modern Europe From the Fall of Constantinople to the Establishment of the German Empire, A.D. 1453-1871 Volume 1
- A History Of The City Of Rome, From Its Foundation To The End Of The Middle Ages
- Ancient Athens: its history, topography, and remains