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Mithraeum of Caernarfon

The Mithraeum of Caernarfon, in Walles, was built in three phases during the 3rd century, and destroyed at the end of the 4th.
19 Jul 2009
Updated 20 Jan 2022
  • General plan of the Caernarfon Mithraeum

    General plan of the Caernarfon Mithraeum
    CIMRM - From 

  • Candelabrum of Caernarfon

    Candelabrum of Caernarfon
    Boon via 


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The temple was located 137 metres north-east of the Roman castra of Segontium on the outskirts of modern Caernarfon in North Wales. The remains were discovered by accident on 2 April 1958 and excavated by the National Museum of Wales in August of the following year under the direction of George Boon.

CIMRM 2374

George C. Boon writes me: 'In August, 1959, a Mithraeum 48 by 21 1/2 ft. was excavated 150 yds. E. of the Roman fort of Segontium (Caernarvon, north Wales) by the National Museum of Wales on behalf of the Ministry of Works.

Related monuments

Candelabrum of Caernarfon

The Caernarfon candelabrum is a reconstruction of several iron pieces found in the Mithraeum of Caernarfon.


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