 His mother, Liadan, is said to have gone to Saighir with a group of women who devoted their lives to the service of God and the members of her son's community.Sier Kieran became the chief church of the Osraighe, a center for the preaching of the Gospel and a large industrial community noted for its wealth.It was superseded by the later monastic foundation of St Canice at nearby Aghaboe.