Llandegai (occasionally spelt Llandygai) The alternative spelling Llandygai appeared on roadsigns in the 1980s and 90s but has more recently been reverted to Llandegai.
It is a small village on the A5 road between Bangor and Tal-y-Bont in Gwynedd, Wales. It affords a view of the nearby Carneddau mountain range. The village is home to Penrhyn Castle, once home of the Pennant family, but now owned by the National Trust.
The village has a parish church which is of cruciform structure with a central tower. In the church is a marble monument to Archbishop John Williams, the Lord Keeper of the Great Seal during the reign of James I. The church and village are named after the church's founding Saint St. Tegai or Tygai, leading to the alternative spellings of the village's name. Relics of the Saint include a stone coffin and a cross bearing his name are kept at the church.
In 1648 during the English Civil War the Battle of Llandegai was fought near the village. Royalist forces of 150 horse and 120 foot soldiers led by Sir John Owen engaged Parliamentarian forces led by Colonel Carter and Colonel Twistleton.
During 2006 and 2007 Gwynedd Archaeological Trust undertook a programme of archaeological work at Parc Bryn Cegin, Llandygai in advance of the expansion of the Llandygai Industrial Estate.
The development area lies close to the site where archaeological monuments of National importance were discovered during the 1960s. These included an early Neolithic house, Later Neolithic ceremonial monuments - two henges and a cursus, Early Bronze Age burials, an Iron Age house followed by Romano-British activity nearby and an Early Medieval cemetery. The discoveries of forty years ago were made in advance of the present industrial estate.
The archaeological excavation is now completed and a considerable amount of very important archaeology has been discovered and recorded. This includes an early Neolithic post-built house, very like the one excavated in the 1960s, Early Neolithic pottery, groups of pits containing Later Neolithic pottery, Bronze Age burnt mounds, late Iron Age to Romano-British roundhouses and a complex of ditches and enclosures.