For clarification this is an object I own; It is a treasured family heirloom - R W Traves Parkinson. St Judicael was an early King of Brittany. He ascended the throne very relucantly and ruled well, before retiring to the monastery of St Meen; who was his friend and mentor. When the Franks threatened Brittany he was called back to the throne by popular acclaim. He made peace with King Dagobert; and having secured the future of Brittany he again retired to the monastery of St Meen. Later he founded the Abbey of Paimpont. Paimpont Abbey his cult centre contains other relics of St Judicael and is still an important place of pilgrimage. Judocus the brother of Judicael was offered the throne but refused it. Instead he followed his brothers example and also became a holy monk. In England he is known as St Josse the Patron Saint of pilgrims. Saint Josse is mentioned in Chaucer's 'The Wife of Bath's Tale'.
The veneration of Saints Relics is an anachronistic and yet persistant aspect of Roman Catholic worship. Miracles continue to be attributed to such relics even today. Relics such as those of St Therese of Lisieux which recently toured the UK often attract thousands of pilgrims.