A History of Venice: Queen of the Seas

Decline and Fall of the Roman Empire

SPQR: A History of Ancient Rome

Heaven or Heresy: A History of the Inquisition

The Medieval World I: Kingdoms, Empires, and War

Mythology

The Medieval World II: Society, Economy, and Culture

The Road to Rome: (The Forgotten Legion Chronicles No. 3)

The Tiber and the Potomac: Rome, America, and Empires of Trust

The Meditations of Marcus Aurelius

Medieval Mysteries: The History Behind the Myths of the Middle Ages

On Benefits

One, Holy, Catholic, and Apostolic: A History of the Church in the Middle Ages

Dynasty: The Rise and Fall of the House of Caesar

Upon This Rock: A History of the Papacy from Peter to John Paul II

Lost to the West: The Forgotten Byzantine Empire That Rescued Western Civilization

From Jesus to Christianity

Classical Mythology A to Z: An Encyclopedia of Gods & Goddesses, Heroes & Heroines, Nymphs, Spirits, Monsters, and Places