Early Christian missionaries arrived in Ireland in the 5th century AD, with St. Patrick's conversion of the Celtic pagans to Christianity being the most well known. Most Irish had become Christian by 600 AD, though Celtic culture and traditions continued with druidic practices declining. Remote monasteries like Skellig Michael and Glendalough were established and became centers of manuscript illumination, metalworking, and high cross carving, with Irish monks traveling abroad to found monastic communities in places like Iona and Bobbio, Italy, earning Ireland a reputation as the 'Island of Saints and Scholars'.