https://historymedieval.com/religious-motivators-faith-relics-and-the-crusader-states/
Religious Motivators: Faith, Relics, and the Crusader States – Medieval History
Religious Motivators: From liberating Jerusalem to preserving relics, faith, devotion, and defense of Christendom were key drivers of the Crusades.
the crusader statesmedieval historyreligiousmotivatorsfaith
https://eprints.lancs.ac.uk/id/eprint/154144/?template=browse
Latin and Greek Monasticism in the Crusader States - Lancaster EPrints
the crusader statesgreek monasticismlancaster eprintslatin