Canons who observe a regular life but unlike monks are not required to withdraw from the world and engage in pastoral work, after the example of the Apostles. They follow the Rule of St Augustine, a letter of guidance compiled by St Augustine of Hippo (d. c. 430), which sets down a schedule for daily communal devotion and emphasises the importance of charity, obedience and individual poverty. The Augustinian Canons preached, taught, cared for the sick and administered the sacraments. The first Augustinian foundation in Wales was established at Llanthony, Monmouthshire, c. 1108.
'Registrum Epistolarum Fratris Johannis Peckham Archiepiscopi Cantuariensis' Rerum Britannicarum medii aevi scriptores; or, Chronicles and memorials of Great Britain and Ireland during the middle ages 77 3 vols (London 1882-1885)
'The life of Robert de Bethune by William de Wycombe: translation with introduction and notes' (University of Oxford 1951)
'The Heads of Religious Houses in England and Wales I, 940-1216' ed.David Knowles, Christopher Brooke and Vera London(London 1972; 2001)
'The Heads of Religious Houses in England and Wales III, 1377-1540' ed.David M. Smith(Cambridge 2008)
'The Heads of Religious Houses in England and Wales II, 1216-1377' ed.David M. Smith and Vera London(Cambridge 2001)
'The Irish cartularies of Llanthony Prima & Secunda / edited from the mss. in the Public Record Office, London' ed.Eric St. John Brooks (Dublin 1953)
'The Register of John de Trillek, Bishop of Hereford (1344-1361)' ed.J. H. Parry (Hereford 1910)
'The Ancient and Present State of Gloucestershire' ed.Robert Atkyns(London 1712; repr. 1974)
'Foundation history [Llanthony]' The Ancient and Present State of Gloucester 2 vols ed.Sir Robert Atkyns(Gloucester 1712, repr. 1974) pp.505-506
'Monasticon Anglicanum: a History of the Abbies and other Monasteries, Hospitals, Frieries, and Cathedral and Collegiate Churches, with their Dependencies, in England and Wales' 6 in 8 vols ed.Sir William Dugdale, rev. J. Caley, H. Ellis, B. Bandinel(London 1817-1830)
Arnold, Christopher J. , 'Excavation of of "Ty Newydd", Ynys Enlli (Bardsey Island), Gwynedd' Archaeologia Cambrensis 147 (2001) pp.96-132
Baddeley, W. St Clair , 'The Story of the Two Lantonys' Transactions of the Bristol and Gloucs. Arch. Soc. 25 (1902) pp.212-221
Bennett, Kirsty, 'The book collections of Llanthony Priory from foundation until dissolution (c. 1100-1538)' (Canterbury: University of Kent 2006)
Bott, Alan, and Dunn, Margaret, 'A Guide to the Priory and Parish Church of St Mary Beddgelert, Gwynedd' (Godalming, Surrey 2004)
Burton, Janet, 'The Monastic and Religious Orders in Britain 1000-1300' (Cambridge 1994)
Butler, L. A. S., 'St Kynemark Priory, Chepstow' The Monmouthshire Antiquary (1965) pp.33-41
Carr, A. D., 'Medieval Anglesey' (Llangefni 1982)
Carr, A. D., 'The Penmon Valor 1374' Transactions of the Anglesey Antiquarian Society & Field Club (2005) pp.13-19
Carr, A. D. , 'The priory of Penmon' Journal of Welsh Ecclesiastical History 3 (1986) pp.18-31
Chitty, M., 'The Monks on Ynys Enlli, pt 2: 1252-1537' (Aberdaron 2000)
Clapham, A. W., 'Haverfordwest Priory: report on excavations of June 1922' Archaeologia Cambrensis 77 (1922) pp.327-334
Cooper, R., 'Abbeys and Priories of Wales' (Swansea 1992)
Cowley, F. G., 'The Monastic Order in South Wales 1066-1349' (Cardiff 1977)
Daniel, Catherine, 'Enlli, porth y nef' (Liverpool 1995)
Davies, M. H., 'A deed of Penmon priory' National Library of Wales Journal 21 (1979) pp.111
Evans, A. C. , 'St John’s Priory, Carmarthen' Archaeologia Cambrensis 31 (1876) pp.96-102
Evans, D. H., 'Excavations at Llanthony priory, Gwent, 1978' The Monmouthshire Antiquary 4 (1980) pp.1-43
Evans, D.H., et al. , 'Further Excavations and Fieldwork at Llanthony Priory' Monmouthshire Antiquarian 5 (1984) pp.1-61
Graham, J. D. P. , 'The treasures of Llanthony' Brycheiniog 23 (1988-1989) pp.43-45
Gresham, Colin A., 'The Parish of Beddgelert' Transactionsof the Caernarvonshire Historical Society 30 (1969) pp.21-28
Gresham, Colin, A., 'Eifionydd: a study in landownership from the medieval period to the present day' (Cardiff 1973)
Griffith, Margaret, 'Report on archaeological investigations, St Marys Church, Beddgelert, 2000-1'
H. L. J., 'Penmon Priory, Anglesey' Archaeologia Cambrensis 3 18 (1863) pp.261
Hague, D. B., 'The medieval church on the Island of St Tudwal' Transactions of the Caernarvonshire Historical Society 21 (1960) pp.6-13
Harper, Sally, 'Music in Welsh Culture before 1650: A Study of the Principal Sources' (Aldershot 2007)
Hogan, Arlene, 'The Priory of Llanthony Prima and Secunda in Ireland, 1172-1541: Lands, patronage and politics' (Dublin 2008)
Holme, G. G., 'Penmon Priory' Procceedings of the Llandudno and Colwyn Bay and District Field Club 12 (1926) pp.14-22
Holme, Geoffrey G., 'Guide to Penmon church and priory' (Llanfairfechan 1935)
Hughes, H. H. , 'Ynys Seiriol' Transactions of the Anglesey Antiquarian Society & Field Club (1935) pp.40-46
J. W. H., 'A Light in the West, the Story of the Church of St Mary, Beddgelert' (1992)
James, T., 'Excavations at the Augustinian Priory of St John and St Teulyddog, Carmarthen, 1979' Archaeologia Cambrensis 134 (1985) pp.120-161
James, Terrence, 'Carmarthenshire's religious houses : a review of recent archaeological work' The Carmarthenshire Antiquary 36 (2000) pp.58-70
James, Terrence, 'Carmarthen priory gatehouse' The Carmarthenshire Antiquary 29 (1993) pp.23-26
Johns, C. N., 'The Celtic monasteries of north Wales' Transactions of the Caernarvonshire Historical Society 21 (1960) pp.14-43
Jones, H. Longueville, 'Beddgelert Priory' Archaeologia Cambrensis 2 (1847) pp.153-166
Jones, H.A. and Lister, G.A., 'The Church of Saint Mary Beddgelert: built on the site of the old Augustinian Priory' (Banbury 1949, 1965 and 1970)
Lovegrove, E. W. , 'Llanthony priory, Monmouthshire' Archaeologia Cambrensis 99 (1947) pp.64-77
Lovegrove, E. W. , 'Llanthony Priory' Archaeologia Cambrensis 97 (1942-1943) pp.213-229
Luff, S. G. A., 'Twenty thousand saints' Pax...; review of the Benedictines of New Caldey (Abbey) 42 (1952) pp.134-139
Pierce, T. J., 'Medieval Welsh society : selected essays' ed.J. B. Smith(Cardiff 1972)
Pierce, T. Jones, 'Bardsey : A study in monastic origins' Transactions of the Caernarvonshire Historical Society 24 (1963) pp.60-77
Platt, Colin, 'The Abbeys and Priories of Medieval England' (Avon 1984)
Proctor, E., 'Llanthony Priory in the Vale of Ewyas : The landscape impact of a medieval priory in the Welsh Marches' (2007)
Rahbula, Ernest A. R., 'Further excavations at Haverfordwest Priory' Archaeologia Cambrensis 79 (1924) pp.334-339
Rees, S., 'The Augustinian Priory' A History of the Town and County of Haverfordwest ed. Dilwyn Miles(Llandysul 1999)
Rees, S. E., 'Haverfordwest Priory' Welsh Historic Monuments (Cardiff 1999)
Rees, Sian E. , 'Haverfordwest Priory : an interim report' Journal of the Pembrokeshire Historical Society 2 (1986) pp.19-23
Roberts, Glynn, 'The Anglesey submission of 1406' Bulletin of the Board of Celtic Studies (1952) pp.58
Robinson, David M., 'The Geography of Augustinian Settlement in Medieval England and Wales' BAR British Series 80 2 vols (Oxford 1980)
Savory, H. N., 'Excavations at Dinas Emrys (Caernarvonshire)' Archaeologia Cambrensis 109 (1960) pp.13-77
Simms, Anngret, 'The geography of Irish manors : the example of the Llanthony cells of Duleek and Colp, county Meath, with an appendix by John Bradley' Settlement and society in medieval Ireland : studies presented to F.X. Martin, OSA ed.John Bradley(Kilkenny 1988) pp.291-326
Stöber, Karen, 'The Regular Canons in Wales' The Regular Canons in the Medieval British Isles Medieval Church Studies 19 (forthcoming 2011)
Talbot, C. H., 'William of Wycombe, fourth prior of Llanthony' Transactions of the Bristol and Gloucestershire Archaeological Society 76 (1958) pp.62-69
Thurlby, Malcolm, 'Romanesque Architecture and Sculpture in Wales' (Little Logaston 2006)
Williams, David H., 'Welsh History through Seals' (Cardiff 1982)
Williams, David H., 'Llanthony Prima Priory' The Monmouthshire Antiquary 25-26 (2009-2010) pp.13-50
Williams, G., 'Carmarthenshire monasteries in the 14th and 15th centuries' The Carmarthenshire Antiquary 3 (1961) pp.138-151
