Segontium

Segontium (Old Welsh: Cair Seiont) is a Roman fort on the outskirts of Caernarfon in Gwynedd, North Wales. The fort, which survived until the end of the Roman occupation of Britain, was garrisoned by Roman auxiliaries from present-day Belgium and Germany. It was the most important military base and administrative centre in this part of Britain.

Segontium
 Segontium shown within Gwynedd
FoundedCE 77 or 78
AbandonedCE 4th century
Place in the Roman world
ProvinceBritannia
Structure
— Stone structure —
Built2nd century
— Wood and earth structure —
Built1st century
Location
Coordinates53.1373°N 4.2659°W / 53.1373; -4.2659
TownCaernarfon
CountyGwynedd
CountryWales
Reference
UK-OSNG referenceSH485624
Site notes
Controlled byCadw
WebsiteSegontium

Etymology

The fort probably takes its name either directly from the Afon Seiont or from a pre-existing British settlement itself named for the river. The name is a Latinised form of the Brythonic language *seg-ontio, which may be translated as "strong place".[1]

There is no evidence that the fort is connected to the Segontiaci, a British tribe noted by Julius Caesar.

History

Roman

Segontium was founded by Agricola in AD 77 or 78 after he had conquered the Ordovices in North Wales. It was the main Roman fort in the north of Roman Wales and was designed to hold about a thousand auxiliary infantry. It was connected by a Roman road to the Roman legionary base at Chester, Deva Victrix. Unlike the medieval Caernarfon Castle that was built alongside the Seiont estuary more than a thousand years later, Segontium was situated on higher ground to the east giving a good view of the Menai Straits.

The original timber defences were rebuilt in stone in the first half of the 2nd century. In the same period, a large courtyard house (with its own small bathhouse) was built within the fort. The high-status building may have been the residence of an important official who was possibly in charge of regional mineral extraction. Archaeological research shows that, by the year 120, there had been a reduction in the military numbers at the fort.[2] An inscription on an aqueduct from the time of the Emperor Septimius Severus indicates that, by the 3rd century, Segontium was garrisoned by 500 men from the Cohors I Sunicorum, which would have originally been levied among the Sunici of Gallia Belgica. The size of the fort continued to reduce through the 3rd and 4th centuries. At this time Segontium's main role was the defence of the north Wales coast against Irish raiders and pirates. Coins found at Segontium show the fort was still occupied until at least 394.

Medieval

Segontium is generally considered to have been listed among the 28 cities of Britain listed in the History of the Britons traditionally ascribed to Nennius,[3] either as Cair Segeint[4] or Cair Custoeint.[5] Bishop Ussher cites another passage in Nennius:[6] "Here, says Nennius, Constantius the Emperor (the father probably of Constantine the Great) died; that is, near the town of Cair Segeint, or Custoient, in Carnarvonshire". Nennius stated that the emperor's inscribed tomb was still present in his day.[5] Constantius Chlorus actually died at York; the Welsh monument might be for Constantine[4] who was the son of Saint Elen, the supposed patron of the Sarn Helen.

In the 11th century, the Normans built a motte nearby, whose settlement formed the nucleus of present-day Caernarfon. Following the 13th-century Edwardian conquest, the earlier work was replaced by Caernarfon Castle.

Present day

Although the A4085 to Beddgelert cuts through the site, most of the fort's foundations are preserved. Guidebooks can be bought from other Cadw sites, including Caernarfon Castle. The remains of a civilian settlement together with a Roman temple of Mithras, the Caernarfon Mithraeum, and a cemetery have been also identified around the fort.

Mythology and fiction

Segontium is referenced in the prose of the Mabinogion, a collection of early medieval Welsh prose first collated in the 1350s. In Breuddwyd Macsen Wledig ("The dream of Macsen Wledig")—one of its Four Independent Tales—Macsen (identified with the Emperor Magnus Maximus) dreams of a beautiful woman (Saint Elen) who turns out to be at "the fort at the mouth of the Seiont".

Wallace Breem's novel Eagle in the Snow begins and ends in post-Roman Segontium and references its temple of Mithras.

The fort also features in The Crystal Cave and The Hollow Hills of Mary Stewart's Merlin trilogy.

  • Foundations of the commander's house
  • Basement strongroom
  • Remains of bath house
  • Plaque marking barrack block
  • Building components unearthed on site
gollark: This *must* be some kind of satire.
gollark: Let's just go for "low Earth orbit" like the ISS.
gollark: Do you have to have some sort of complex gyroscopic system to maintain Mecca-facing-ness?
gollark: I mean, Islam has day-night-cycle-based prayers (problematic in space) and the pray-toward-the-Mecca requirement.
gollark: I wonder, does Judaism have possible issues translating to space like Islam?

See also

References
  1. Ranko Matasović. "sego-" in: Etymological Dictionary of Proto-Celtic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill, 2015. Brill Online. February 8, 2015. http://iedo.brillonline.nl/dictionaries/lemma.html?id=17113%5B%5D
  2. "Segontium - The Romans in North Wales". National Museum Cardiff. 10 May 2007.
  3. Nennius (attrib.). Theodor Mommsen (ed.). Historia Brittonum, VI. Composed after AD 830. (in Latin) Hosted at Latin Wikisource.
  4. Ford, David Nash. "The 28 Cities of Britain" at Britannia. 2000.
  5. Newman, John Henry & al. Lives of the English Saints: St. German, Bishop of Auxerre, Ch. X: "Britain in 429, A. D.", p. 92. James Toovey (London), 1844.
  6. On page 20 of Stevenson's 1838 edition of Nennius's works.
  • Frances Lynch (1995) A guide to ancient and historic Wales: Gwynedd (HMSO)
  • R.E. Mortimer Wheeler (1924) Segontium and the Roman occupation of Wales (Honourable Society of Cymmrodorion)
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