Just from the Christian perspective, all the priests and monks are identifiable from their outfits. As kids we knew the difference between Franciscan, Dominican, Coptic, Greek Orthodox, Russian Orthodox, Syrian Orthodox and Christian Brother. Most of the Christian holy sites are run be the Franciscan Order dating back to Malik al-Kamil (the Egyptian Sultan during the Crusades) who gave St Francis dominion over the Christian holy places after meeting with him in 1219!