Caernarfon: Pilgrimage History and Roman Heritage

Around Caernarfon, very different historical themes stand side by side: a church on the pilgrimage route to Bardsey, an Iron Age hillfort on Yr Eifl and the Roman fort of Segontium on the outskirts of town. These places offer different perspectives—from the history of religious journeys and a hilltop fortification to the military and administrative significance of the Romans in northwest Wales.

Pilgrimage history at St Aelhaearn’s Church

St Aelhaearn’s Church lies on the pilgrimage route to Bardsey. Pilgrims stopped there after visiting St Beuno’s Church in Clynnog. This places the church within a specific sequence: a stop in Clynnog was followed by a visit to the church on the way to Bardsey. For anyone interested in the history of religious journeys, this connection links two named churches with a destination. The focus here is not on how long a site remained occupied, but on the church’s role along a pilgrimage route.

Tre’r Ceiri on the summit of Yr Eifl

Tre’r Ceiri offers a very different perspective on time: it is an Iron Age hillfort on the easternmost summit of Yr Eifl. The site is dated approximately to the period from 800 BC to AD 74. This approximate dating indicates a broad span of time rather than a single year. Its summit location and classification as a hillfort give it a different character from the Roman fort on the outskirts of Caernarfon: here, the focus is an Iron Age hilltop fortification, while there it is a Roman military site.

Segontium: the fort and regional history

Segontium lies on the outskirts of Caernarfon in Gwynedd, North Wales. The remains of the Roman fort are on a hill east of Castell Caernarfon; the ground plans of many buildings are still visible. The fort was designed for an auxiliary infantry regiment of 1,000 men. Cadw offers guided tours each year on selected dates between May and August. If you are planning to join a tour, check the dates in advance.

Segontium’s significance extends beyond the site itself. During the Roman period, it was the military and administrative centre of northwest Wales. The Romans occupied the fort until around AD 394—longer than any other fort in Wales. Two scales of history come together here: the fort’s long period of occupation and its role in the wider regional framework. Together, these aspects make Segontium a tangible point of reference for travellers interested in both Roman military history and the organisation of a region.

Surroundings and choosing a destination

The places mentioned also differ in their geographical setting. Segontium is on the outskirts of Caernarfon, while Tre’r Ceiri and St Aelhaearn’s Church are nearby. If you are looking for a holiday apartment in Caernarfon, you can take this distinction into account when choosing where to stay: is Roman history in the town the main focus, or would you also like to explore the nearby area and its Iron Age and pilgrimage history? This helps you decide what to focus on during your trip without combining the places into a single route.

Llanaelhaearn is also in the surrounding area. It is a village and community in the Welsh county of Gwynedd, on the Llŷn Peninsula. This adds another point of reference beyond the individual historic sites: Llanaelhaearn is a place in its own right on the peninsula.

Discover more destinations: Llanarmon, Dinas-Mawddwy, Aberangell, Blaenau Ffestiniog, Deiniolen, Llanrug, Y Felinheli, Penrhyndeudraeth.

View the wider travel guide: Gwynedd.