 Finnian of Clonard studied under Cadoc at Llancarfan in Glamorgan.Finnian of Clonard is said to have trained the Twelve Apostles of Ireland at Clonard Abbey.The achievements of insular art, in illuminated manuscripts like the Book of Kells, high crosses, and metalwork like the Ardagh Chalice remain very well known, and in the case of manuscript decoration had a profound influence on Western medieval art.