From history.com: Crusader Shipwreck Tells a Golden Knights’ Tale.

In the 13th century A.D., the city of Acre on Israel’s northern coast was a key stronghold for embattled European Crusaders defending Christianity in the Holy Land. But in 1291, a vast Egyptian army of some 100,000 soldiers led by the new Mamluk sultan overran the Crusader garrison there and razed the city. Now, marine archaeologists have discovered a long-lost ship that met its watery end in the crescent-shaped bay off the city’s harbor. Carbon dating of the ship, and the cache of gold coins found inside, suggests the wreck dates to the siege of Acre, as Christians made a desperate attempt to flee the city and their knights made their doomed last stand. [continue]