The ancient city of Aleppo was besieged twice by Crusaders in the early 12th century, but little did residents know that worse was yet to come. Located on the boundary between the Arabian and African geologic plates in what is now northern Syria, the city was hit by a small earthquake on October 10, 1138, prompting some residents to flee. The next day, Aleppo was rocked by one of the deadliest earthquakes in recorded history. It destroyed the city and the nearby Crusader citadel. How many died? Discuss (http://forum.thefreedictionary.com/postst43948_The-Aleppo-Earthquake--1138-CE-.aspx)
Source: The Aleppo Earthquake (1138 CE) (http://encyclopedia.thefreedictionary.com/1138+Aleppo+earthquake)