What role did the Monastery of Cluny play in the First Crusade?

The Monastery of Cluny, founded in 910 in Burgundy, France, was a significant center of monastic reform and spiritual revival in medieval Europe. While it was not directly involved in the military aspects of the First Crusade (1096-1099), Cluny's influence was notable in promoting the idea of the Crusade through its emphasis on pilgrimage, spiritual warfare, and the need for Christian unity against perceived threats to Christendom. The Cluniac reform movement helped foster a sense of religious zeal and provided moral and spiritual support for those who participated in the Crusade, encouraging the belief that undertaking such a journey was a pious act.