A Latin monastic presence was part of the landscape of the Holy Land as early as the fourth century. Although the Latin presence waned after the Arab Conquest of the seventh century, interest and involvement in the monastic presence of the Holy Land continued, notably in the reign of Charlemagne in the early ninth century. The eleventh century saw increased knowledge of conditions for Christians in the Holy Land as pilgrimage from the West became more widespread. By the eve of the First Crusade in 1095, the Latin and Greek Orthodox Churches had drifted apart in observance of religious customs, but they remained in communion. The purpose of the Crusade was to revive and strengthen the Christian presence in the Holy Land.