Welsh: Llandeilo Gresynni
Church of St Teilo, Llantilio Crossenny
Llantilio Crossenny is a small village and ancient parish in Monmouthshire. It is a rural village standing between the towns of Abergavenny and Monmouth on the B4223 road. The River Trothy forms the parish's entire western and southern boundaries and also the boundary between the hundred of Skenfrith and neighbouring Abergavenny to the west and Raglan to the south.
The village has the White Castle, a fine example of the mediæval castle builder's art which stands on the hill overlooking the village. The Three Castles Walk passes close by.
The village is known for its annual Festival of Music and Drama in every May.
St Teilo's Church , the Anglican parish church dates from the 13th century and has been described as a 'baby cathedral' because of its large size and tall pointed spire. It contains a Green Man figure above an aisle
The site of the village or at least the locality is associated with a battle in the early Middle Ages between King Ynyr of Gwent and the incoming Saxons.
The Normans when advancing into Wales built many castles in this border area of the Welsh Marches. It is also associated with Dafydd Gam, a local warrior and Welsh ally of King Henry V.