Segonium, National Trust Wales

Caernarfon, Gwynedd LL55 2LN
phone: 01286 675625


The Romans did get here, and this was a Roman military settlement, just on the outskirts of modern Caernarfon

The National Trust own the Roman fort, built to defend this corner of the Roman Empire against rebellious Welsh tribes.

Edward I's castle builders later removed most of the stone from the Roman fort to build Caernarfon Castle, also designed to keep the native Welsh in check

There is a National Trust  museum on the site containing Roman relics found there


  • All year.
  • March, April & Oct: Mon to Sat 9.30 to 5.30, Sun 2 to5.
  • May to Sept: Mon to Sat, 9.30 to 6, Sun 2 to 6.
  • Nov to end Feb: Mon to Sat 9.30 to 4, Sun 2 to 4.
  • Closed 24 to 26 Dec & New Years Day
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