Marchwiel is dedicated to Deiniol and there are also dedications at Itton in Monmouthshire and Llangarron in Herefordshire. William Ewart Gladstone dedicated St Deiniol's Library, a residential library in Hawarden, Flintshire, for arts students, in 1896. In the current Roman Catholic liturgical calendar for Wales and that of the Anglican Church in Wales, he is commemorated on the traditional date of 11 September. His name has been given to the Deiniol Centre, a shopping centre in Bangor. He may be referenced in the name of the hymn tune, ST. DENIO ("Immortal, invisible") References Sources S. Baring-Gould and John Fisher. (1908). The Lives of British Saints C.J. Clark. The Saints of Wales and Cornwall and such Irish Saints as have dedications in Britain Further reading External links "The Life of St. Deiniol", Peniarth MS. 225 (1602), p. 155. 584 deaths Bishops of Bangor Medieval Welsh saints 6th-century Welsh bishops 6th-century Christian saints Year of birth unknown