Prasutagus was king of a British Celtic tribe called the Iceni, who inhabited roughly what is now Norfolk, in the 1st century AD. His wife was Boudicca.

Prasutagus may have been installed as a pro-Roman ruler following the defeat of a rebellion of the Iceni in 47. As an ally of the Rome his tribe were allowed to remain nominally independent, and to ensure this Prasutagus named the Roman emperor as co-heir to his kingdom, along with his two daughters. When he died, in 60 or shortly before, the Romans ignored his will and took over, depriving the nobles of their lands and plundering the kingdom. Roman financiers called in their loans. Boudicca was flogged and their daughters raped. All this led to the revolt of the Iceni, under the leadership of Boudicca, in 60 or 61.

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