The Bank That Financed the Crusades (Then Got Destroyed For It)

The Crusades are remembered as holy war. The reality underneath them was a financial operation on a staggering scale. A single crusade could cost a knight four to five times his annual income — forcing widespread land mortgages across Europe. The Church built an entire fundraising machine to cover the gap: vow redemptions, crusading taxes, and a financial bureaucracy that would later become the direct blueprint for the indulgence sales that triggered the Reformation. This video traces the real economics of the Crusades: the debt that bankrupted crusading families, the Fourth Crusade's descent into sacking a fellow Christian city over an unpaid invoice to Venice, and the Knights Templar — who built one of history's first true international banking networks, until the king who owed them money decided it was easier to destroy them than repay them. 🔔 Subscribe to Market Memory for more deep dives into the financial forces behind history's biggest turning points.