How many years did the crusades continue off?

The Crusades spanned approximately 200 years, starting in 1096 with the First Crusade and continuing until the fall of Acre in 1291, which marked the end of the major Crusades. Various smaller military campaigns and conflicts continued after this period, but the main series of Crusades is generally considered to have lasted from the late 11th century to the late 13th century.