Caer Gybi (fort)

Caer Gybi
Anglesey, Wales, UK
Roman Wall surrounding St Cybi's Church
Location
Caer Gybi
Location in Anglesey
Coordinates53°18′42″N 4°37′58″W / 53.3118°N 4.6328°W / 53.3118; -4.6328
Grid referenceSH247826

Caer Gybi was a small fortlet and naval base in Roman Wales in the Roman province of Britannia Superior built sometime in the 3rd or 4th century. It stands at the centre of Holyhead in the Welsh county of Anglesey.