Caer Gybi, Roman fort in Holyhead, Wales.
The fort consists of three defensive walls with corner towers, reaching heights of 4 meters and incorporating herringbone masonry construction techniques.
Built around 300 AD during the Roman occupation of Britain, Caer Gybi served as a defense point against Irish pirates along the Welsh coast.
The medieval Church of St Cybi stands within the fort walls, marking the location where Saint Cybi established a monastery in the 6th century.
The fort remains are accessible through Victoria Road on the north side of Holyhead harbor, with clear signage directing visitors from the town center.
Caer Gybi represents one of only three Roman forts in Europe constructed with three walls, as the fourth side opened directly to a natural harbor.
Location: Holyhead
Elevation above the sea: 12 m
GPS coordinates: 53.31140,-4.63278
Latest update: March 4, 2025 09:39
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