 Illtud is venerated as the founder-abbot and teacher of the divinity school known as Cor Tewdws, located in Llanilltud Fawr (Llantwit Major) in the county of Glamorgan.He founded the monastery and college in the 6th century, and the school is believed to be Britain’s earliest centre of learning.His feast day and commemoration is celebrated on 6 November.