How long did The crusades continued off and on?

The Crusades spanned nearly two centuries, beginning in 1096 with the First Crusade and continuing in various forms until the late 13th century, with the fall of Acre in 1291 marking the end of the major Crusader states. Various expeditions and campaigns occurred intermittently during this period, leading to a series of military conflicts between Christian and Muslim forces in the Holy Land. While the most notable Crusades occurred between 1095 and 1291, the concept of crusading continued in different contexts even beyond this period.