• 2005 Otto Grundler Prize, Medieval Institute WMU News - Grundler Prize awarded for book on Venetian leader
• 2007 Haskins Medal, Medieval Academy of America, for the book Enrico Dandolo and the Rise of Venice MAA Haskins Medal Winner

Books

• Empires of Trust: How Rome Built -- And America Is Building -- A New World, 2008, Dutton/Penguin
• The Fourth Crusade: Event, Aftermath, and Perceptions, 2008, Ashgate.
• The New Concise History of the Crusades, 2005, Rowman & Littlefield
• Crusades: The Illustrated History, 2005, University of Michigan Press
• Enrico Dandolo and the Rise of Venice, 2003, Johns Hopkins University Press
• The Crusades: The Essential Readings, 2002, Blackwell
• Medieval and Renaissance Venice, 1999, University of Illinois Press
• The Fourth Crusade: The Conquest of Constantinople, 1997, University of Pennsylvania Press

Select Popular Articles

• "America's Days Aren't Numbered", The Wall Street Journal, July 4, 2008.
• "Not Dead Yet: The Lost Tomb of Jesus -- One Year Later", NRO, March 21, 2008.
• "Unreasonable Response: Benedict XVI Hasn't Revived the Crusades," NRO, September 18, 2006.
• "Crusaders and Historians," First Things, June/July 2005.
• "Onward P.C. Soldiers: Ridley Scott's Kingdom of Heaven, NRO, May 27, 2005.
• "The Real Inquisition: Investigating the Popular Myth,", NRO, June 18, 2004.
• "The Truth About the Spanish Inquisition", Crisis, October 2003.
• "The Real History of the Crusades", Crisis, April 2002. The Real History of the Crusades

Select scholarly articles

• "The Latin Empire of Constantinople’s Fractured Foundation: The Rift Between Boniface of Montferrat and Baldwin of Flanders," in The Fourth Crusade: Event, Aftermath, and Perceptions (Brookfield: Ashgate Publishing, 2008): 45-52.
• "Food and the Fourth Crusade: A New Approach to the 'Diversion Question,'" in Logistics of Warfare in the Age of the Crusades, John H. Pryor, ed. (Brookfield: Ashgate Publishing, 2006): 209-28.
• "Venice, the Papacy, and the Crusades before 1204," in The Medieval Crusade, Susan J. Ridyard, ed. (Woodbridge: Boydell and Brewer, 2004): 85-95.
• "The Enduring Myths of the Fourth Crusade," World History Bulletin 20 (2004): 11-14.
• "The Chrysobull of Alexius I Comnenus to the Venetians: The Date and the Debate," Journal of Medieval History 28 (2002): 23-41.
• "Venice's Hostage Crisis: Diplomatic Efforts to Secure Peace with Byzantium between 1171 and 1184," in Ellen E. Kittell and Thomas F. Madden, eds., Medieval and Renaissance Venice (Urbana: University of Illinois Press, 1999): 96-108.
• "Outside and Inside the Fourth Crusade," The International History Review 17 (1995): 726-43.
• "Venice and Constantinople in 1171 and 1172: Enrico Dandolo’s Attitude towards Byzantium," Mediterranean Historical Review 8 (1993): 166-85.
• "Vows and Contracts in the Fourth Crusade: The Treaty of Zara and the Attack on Constantinople in 1204," The International History Review 15 (1993): 441-68.
• "Father of the Bride: Fathers, Daughters, and Dowries in Late Medieval and Early Renaissance Venice," Renaissance Quarterly 46 (1993): 685-711. (with Donald E. Queller)
• "The Fires of the Fourth Crusade in Constantinople, 1203-1204: A Damage Assessment," Byzantinische Zeitschrift 84/85 (1992): 72-93.
• "The Serpent Column of Delphi in Constantinople: Placement, Purposes, and Mutilations," Byzantine and Modern Greek Studies 16 (1992): 111-45.

Recorded lectures

• "God Wills It!" Understanding the Crusades
• The Decline and Fall of Rome
• From Jesus to Christianity: The History of the Early Church
• Upon This Rock: A History of the Papacy from Peter to John Paul II
• Empire of Gold: A History of the Byzantine Empire
• One, Holy, Catholic, and Apostolic: A History of the Church in the Middle Ages
• Christianity and the Crossroads: The Reformations of the Sixteenth and Seventeenth Centuries
• Heaven or Heresy: A History of the Inquisition
• The Catholic Church in the Modern Age

• Decoding the Past, "Spear of Christ"
• Decoding the Past, "Secrets of the Koran"
• The Big Build, "The Castle Tower"