Isurium Brigantum

Isurium or Isurium of the Brigantes (Latin: Isurium Brigantum) was a Roman fort and town in the province of Britannia at the site of present-day Aldborough in North Yorkshire, England, in the United Kingdom. Its remains—the Aldborough Roman Site—are in the care of English Heritage.

The Roman road through the town formed a leg of both Dere Street—connecting Eboracum (York) to the Antonine Wall—and the Roman equivalent of Watling Street, which here connected Eboracum with Luguvalium (Carlisle). The modern village retains part of the Roman street plan and the church stands on the site of the forum.

Isurium Brigantium, one of the northernmost urban centres of the Roman Empire was probably founded in the late first century or early second century. The Roman civitas was the administrative centre of the Brigantes tribe, the largest and most northerly tribe in Roman Britain. Roman towns such as Exeter, Leicester, Chichester and Canterbury had the same status as Isurium.

Tacitus recorded that Isuer was the seat of Venutius, king of the Brigantes who was usurped from power by his wife, Cartismandua and her lover Volucatus at the beginning of the first century. Cartismandua welcomed the Romans who perceived little threat from the Brigantes and the Roman army focused its occupation to the south of Brigantium. When Venutius and his followers began to attack Briganti centres towards the end of the first century, the Roman army pushed further north. Tacitus reports the final subjugation of the Brigantes came about by Julius Agricola in 79 AD. who then constructed Isurium.

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