Hidden Britain AtlasOpen the map
All places › Roman Britain
Roman Britain

Segontium

Caernarfon, Gwynedd

A fort at the edge of the Roman world, linked to a Welsh legend.

Segontium was built around AD 77 to control north-west Wales and was used for over 300 years. In the Welsh legend The Dream of Macsen Wledig, a Roman emperor dreams of a beautiful princess in a fort by the sea and finds her here.

Read the full story, see it on the map, get directions and find what else is nearby in the free Hidden Britain Atlas map.

Open Segontium on the mapReport a sighting here
When
From AD 77
Where
53.1390, -4.2680
Group
Roman Britain

Visiting

Cadw, free, on the edge of Caernarfon.

Cover of The Ledger of Lost Britain by Cale Mills
Read the full story in the book

The Ledger of Lost Britain

The Romans arrived in AD 43. For most people that is where the history of Britain begins. But by the time the legions landed, people had already been living on these islands for thousands of years. They had hunted, farmed, mined flint, dragged stones across the country, raised a hill by hand, and buried their dead in great tombs. They left no written words. What they left was the ground itself. Every place in this book can be visited, or has been dug up, or is in a museum.

Buy on AmazonAll books by Cale Mills

Nearby mysteries