Church of St Teilo
|OS grid reference|
|Sovereign state||United Kingdom|
Llantilio Crossenny (Welsh: Llandeilo Gresynni) is a small village and much larger community in Monmouthshire, south east Wales, in the United Kingdom. It is situated between the two towns of Abergavenny and Monmouth on the B4233 road.
In January 2015 metal detectorists unearthed axe and spear heads, thought to be around 3,000 years old, in a field near the village. The items are thought to date back to Ewart Park phase of the late Bronze Age, about 1000-800 BC. Principal Curator of Prehistory at National Museum Wales, Adam Gwilt, said: "Many whole and still usable bronze objects were carefully buried in the ground at this particular time and archaeologists now think that these may have been gifts to the gods and ancestors, buried during ritual ceremonies. It is curious that this place in the landscape was chosen for the burial of two hoards of the same date and very close to each other."
The site of the village, or at least the locality, is associated with a battle between a Dark Ages King of the Welsh Kingdom of Gwent, Ynyr, and the incoming Saxons. The village is also associated with the incoming Normans in Wales who built many castles in this border area of the Welsh Marches and with Dafydd Gam, a local warrior and Welsh ally of King Henry V. A Free Grammar School was founded in the village, on 10 August 1654, by James Powell, Gentleman of Cymmerau. In 1924 a history of the grammar school was published by local historian Sir Joseph Bradney.
- Sir Henry Jackson, 2nd Baronet (1831–1881) Member of Parliament (MP) for Coventry from 1867–1868 and 1874–1881, and a Deputy Lieutenant of Monmouthshire who lived at Llantilio Court from 1873 until his death in 1881. His son, Sir Henry Mather-Jackson, 3rd Baronet, bought the lordship of the manor of Llantilio Crossenny and the ruins of the White Castle from the 9th Duke of Beaufort in May 1902.
- "Parish population 2011". Retrieved 4 April 2015.
- Bradney, J. A. (1924) A History of the Free Grammar School in the Parish of Llantilio-Crosseny in the County of Monmouth Mitchell Hughes and Clarke
- Newman 2000, pp. 350-1.
- "LLANCROSFEST". llantiliofestival.co.uk/. Retrieved 26 June 2013.
- Nigel Jarrett (12 June 2009). "Centenary of Monmouthshire composer marked". southwalesargus.co.uk. Retrieved 26 June 2013.
- "Ward population 2011. Retrieved 4 April 2015".
- Councillors, Llantilio Crossenny Community Council. Retrieved 17 March 2016.
- "Sale of the Duke of Beaufort′s estate". The Times (36782). London. 31 May 1902. p. 12.
- Newman, John (2000). Gwent/Monmouthshire. The Buildings of Wales. London: Penguin. ISBN 0-14-071053-1.