The monks of Cwmhir, 'the abbey of the long valley', had divided loyalties. It was founded by the Welsh ruler of Maelienydd but from time to time the area came under the control of the Mortimer family. The community thus enjoyed the patronage of the native Welsh and the Marcher lords. Equally, their position between the two sources of power left them subject to danger.show details of standing remains
'Royal ruins safeguarded', Heritage in Wales, 2 (1998 (autumn))
The Heads of Religious Houses in England and Wales, I, 940-1216, ed. D. Knowles, C. Brooke and V. London (London, 1972; 2001) pp. 126, 270
The Heads of Religious Houses in England and Wales, II, 1216-1377, ed. D. M. Smith and V. London (CUP: Cambridge, 2001) p. 258
The Cistercian Abbeys of Britain: far from the concourse of men, ed. David M. Robinson (London, 1998) pp. 94-96
The Heads of Religious Houses in England and Wales, III, 1377-1540, ed. David M. Smith (CUP: Cambridge, 2008) p. 261
Statuta Capitulorum Generalium Ordinis Cisterciensis ab Anno 1116 ad Annum 1786, 8 vols, ed. Josef Canivez (Louvain, 1933-1941)
Medieval Monasteries of Great Britain, ed. Lionel Butler and Christopher Given-Wilson (London, 1979) p. 201
Medieval Religious Houses, England and Wales, ed. R. Neville Hadcock and David Knowles (Harlow, 1971) pp. 112, 115
Banks, R. W., 'Notes to the account of Cwmhir Abbey, Radnorshire', Archaeologia Cambrensis, 5th series, 5:19 (1888), pp. 204-217
Bell, David, An index of authors and works in Cistercian libraries in Great Britain (Kalamazoo, 1992)
Blockley, K., 'Abbeycwmhir', Archaeology in Wales, 38 (1998), p. 140
Brand, J. D., 'A find of late twelfth-century French coins at Abbey Cwmhir in Mid-Wales', Bulletin de la Societe Francaise de Numismatique Paris, 33.9 (1978), pp. 372-374
Brooksby, H., 'A twelfth-century relic of Abbey Cwm-hir?', Archaeologia Cambrensis, 119 (1970), pp. 132-133
Burton, Janet, 'The foundation of the British Cistercian houses', in Cistercian Art and Architecture in the British Isles, ed. Christopher Norton and David Park (Cambridge, 1986), pp. 24-39
Butler, L. A. S., 'The lost choir: What was built at three Cistercian abbey churches in Wales?', in Perspectives for an Architecture of Solitude: Essays on Cistercians, Art and Architecture in Honour of Peter Fergusson, Medieval church studies, 11; Cîteaux. Studia et documenta, 13, ed. Terryl N. Kinder (Turnhout, 2004), pp. 115-123
Charles, B. G, 'An early charter of the abbey of Cwmhir', Transactions of the Radnorshire Society (1970), pp. 68-74
Cole, E. J. L., 'Cistercian candidates', Transactions of the Radnorshire Society, 20 (1950), pp. 13-18
Cooper, R., Abbeys and Priories of Wales (Swansea, 1992) pp. 51-53
Cowley, F. G., The Monastic Order in South Wales 1066-1349 (Cardiff, 1977)
Crump, J. J., 'The Mortimer family and the making of the march', in Thirteenth century England, 6, ed. M. Prestwich, R. H. Britnell and R. Frame (Woodbridge, 1997), pp. 117-126
Davies, D. R., 'Abbey Cwmhir', Transactions of the Radnorshire Society, 16 (1946), pp. 33-42
Davies, D. S., 'Abbey Cwm Hir', Transactions of the Radnorshire Society, 4 (1934), pp. 55-61
Davies, J., The Stones of Abbey Cwmhir (Llandidrod Wells, 1992)
Davies, John, Abbey Cwmhir in Radnorshire: History of the Abbey (The Abbey Cwmhir Heritage Trust: Cwmhir, 1999)
Davies, John, 'Cerrig Abaty Cwm-hir = The Stones of Cwmhir Abbey', in Cerrig Yng Nghymru: Deunyddiau, Treftadaeth a Chadwraeth: Papurau o Gynhadledd Cerrig Yng Nghymru, Caerdydd 2002 = Stone in Wales: Materials, Heritage and Conservation: Papers from the Welsh Stone Conference, Cardiff 2002, ed. Malcolm R. Coulson (Cardiff, 2005), pp. 49-53
Day, E. H., 'The Cistercian abbey of Cwm Hir', Archaeologia Cambrensis, 6th series, 11 (1911), pp. 9-25
Day, E. H., 'The Cistercian Abbey of Cwm Hir immediately before the Dissolution', Archaeologia Cambrensis, 7th series, 79 (1924), pp. 284-290
Dunn, Elizabeth, 'Owain Glynd?r and Radnorshire', Transactions of the Radnorshire Society, 67 (1937), pp. 27-35
Evans, D., Register of Landscapes, Parks and Gardens of Special Historic Interest in Wales, Part 1, Parks and Gardens: Powys (Cadw: Welsh Historic Monuments: Cardiff, 1999) pp. 118-122
Fleming, A., 'Horses, elites...and long-distance roads', Landscapes, 11:2 (2010), pp. 1-20
Fleming, Andrew, 'The Making of a Medieval Road: the Monk’s Trod Routeway, Mid Wales', Landscapes, 10: 1 (2009), pp. 77-100
Gambrell, Anthony, 'Abbey in Welsh Uplands', Country Quest, 29: 7 (1988), pp. 28, 40
Gray, Madeleine, 'Preface to Cistercians in Wales and the west', Archaeologia Cambrensis, (2007), pp. 17-26
Grigson, G., 'The abbey of the long vale', Country Life, 125, pp. 94-96
Hamer, E., 'A parochial account of Llanidloes', Montgomeryshire Collection, 6 (1873) pp. 163-176
Harper, Sally, Music in Welsh Culture before 1650: A Study of the Principal Sources (Ashgate: Aldershot, 2007)
Haslam, Richard, The Buildings of Wales: Powys (Harmondsworth, 1979) pp. 140-142, 215-216
Hurlock, Kathryn, 'Pilgrimage', in Monastic Wales: New Approaches, ed. Janet Burton and Karen Stöber (University of Wales: Cardiff, 2013), pp. 119-131
Jones, N. W., 'Cwmhir Abbey, Abbeycwmhir', Archaeology in Wales, 40 (2000), pp. 124-6
Jones, N. W., 'Abbeycwmhir: re-survey of the ruins', Clwyd-Powys Arch. Trust Report (unpublished), 225: 2 (Welshpool, 2000)
Jones, N. W. and Thomas, D., 'Abbeycwmhir', Archaeology in Wales, 37 (1997), p. 106
Lovegrove, E. W., 'Llanidloes Church', Archaeologia Cambriensis, 87 (1932), pp. 434-435
Newbolt, M. R., The Cistercians in Britain, together with a Catalogue of Cistercian Houses in England, Scotland and Wales, with notes by Wilfred Steer (Wantage, 1957)
O'Sullivan, J. F., Cistercian settlements in Wales and Monmouthshire, 1140-1540, Fordham Univ. Studies, History series, 2 (New York, 1947) pp. 10-11
Percival, David, 'The boundary of the medieval grange of Dolhelfa', Transactions of the Radnorshire Society, 63 (1993), pp. 42-44
RCAHMCW, Radnor: RCAHMCW Monmouthshire, Inventories (London, 1913) pp. 3-7
Radford, Courtenay Arthur Ralegh, 'The Cistercian abbey of Cwmhir, Radnorshire', Archaeologia Cambrensis, 131 (1982), pp. 58-76
Rees, Sian E., Jones, Nigel W. and Silvester, Robert J., 'Conservation and investigation at Cwmhir Abbey, Powys', Archaeologia Cambrensis, 154 (2007), pp. 133-151
Rees, W. J., 'Account of Cwmhir Abbey, Radnorshire', Archaeologia Cambrensis, 4:16 (1849), pp. 233-260
Remfry, P. M., Short Political History of Abbey Cwmhir and its Patrons, 1176 to 1282 (Worcester, 1995)
Remfry, P. M., 'Cadwallon ap Madog Rex de Delvain, 1140-1179 and the re-establishment of local autonomy in Cynllibiwg', Transactions of the Radnorshire Society, 65 (1995), pp. 11-32
Remfry, P.M., The Political History of Abbey Cwmhir, 1176 to 1282 and the Families of Elystan Godrydd, Mortimer and the Princes of Gwynedd (Worcester, 1994,)
Robinson, David M., The Cistercians in Wales: Architecture and Archaeology 1130-1540, Society of Antiquaries of London, Research Committee Report (London, 2006) pp. 230-234
Robinson, David M. and Harrison, Stuart, 'Cistercian Cloisters in England and Wales: Part I', Journal of the British Archaeological Association, 159 (2006), pp. 131-207
Rowley-Morris, E., 'Possessions of the abbot and convent of Cwmhir in Kerry', Mongomeryshire Collections, 27 (1893), pp. 81-91
Stephenson, D., 'Llywelyn Fawr, the Mortimers, and Cwmhir Abbey: the Politics of Monastic Rebuilding', The Transactions of the Radnorshire Society, 80 (2010), pp. 29-41
Stephenson, David, 'The rulers of Gwynedd and Powys', in Monastic Wales: New Approaches, ed. Janet Burton and Karen Stöber (University of Wales: Cardiff, 2013), pp. 89-102
Stephenson, David, 'The chronicler at Cwm-hir abbey, 1257-63: the construction of a Welsh chronicle', in Wales and the Welsh in the Middle Ages, ed. R. A. Griffiths and P. R. Schofield (University of Wales Press: Cardiff, 2011), pp. 29-45
Tibbott, Gildas, 'An Abbey-Cwmhir relic abroad', Transactions of the Radnorshire Society, 5 (1935), pp. 64-67
Williams, David H., The Welsh Cistercians (Leominster, 2001)
Williams, David H., The Cistercians in the Early Middle Ages (Leominster, 1998)
Williams, David H., Atlas of Cistercian Lands in Wales (Cardiff, 1990) pp. 40-1
Williams, David H., Abbey-Cwmhir (Powys County Council: Llandrindod Wells, 1978)
Williams, David H., 'Catalogue of Welsh ecclesiastical seals as known down to AD 1600, 4: Seals of Cistercian monasteries', Archaeologia Cambrensis, 136 (1988), pp. 138-155
Williams, David H., 'The White Monks in Powys, I: Cwmhir', Cistercian Studies, 11:2 (1976), pp. 74-101
Williams, David H., 'Stephen William Williams: the archaeologist and soldier: the man and his family', Transactions of the Radnorshire Society, 69 (1999), pp. 131-141
Williams, J., A General History of the County of Radnorshire, ed. E. Davies (Brecknock, 1905) pp. 338-340
Williams, S. W., 'The abbey of Cwmhir, Radnorshire', Archaeologia Cambrensis, 5th series, 7:26 (1890), pp. 150-152
Williams, S. W., 'The Cistercian Abbey of Cwmhir', Montgomeryshire Collections, 24 (1890), pp. 395-416
Williams, S. W., 'The Cistercian abbey of Cwmhir, Radnorshire', Transactions of the Hon Soc Cymmrodorion, (1894-5), pp. 61-98