
Gone Medieval Crusaders in Crisis: The Rebel Emperor & the Siege of Constantinople
Mar 10, 2026
Dr. Tom Smith, historian of the Crusades and author of The Fifth Crusade, brings concise expertise on 13th-century crusading chaos. He traces the diversion of crusades from Egypt to Constantinople, the shocking sack of the city, and the ambitious sieges at Damietta and Mansoura. He also explores Frederick II’s unconventional diplomacy and the fracturing of crusading authority.
AI Snips
Chapters
Books
Transcript
Episode notes
Crusading Becomes Politicized Powerplay
- The Fourth–Sixth Crusades mark a shift from unified holy war to fragmented, politicized campaigns.
- By 13th century, papal aims, rival monarchs, and city-states turned crusading into competing power politics rather than a single spiritual mission.
Innocent III Rewrote How People Crusade
- Pope Innocent III institutionalized crusading participation beyond battlefield service.
- He codified indulgences, proxy crusading, and church taxes (e.g., 40th and 20th) to broaden funding and involvement.
Why The Fourth Crusade Turned Toward Constantinople
- The Fourth Crusade began as an Egyptian expedition but derailed over ship payments and Venetian leverage.
- Venice built specialized landing craft then exploited a 30,000-man shortfall to push attacks on Zara and later Constantinople.

