The Rogiet hoard is a hoard of 3,778 Roman coins found at Rogiet, Monmouthshire, Wales in September 1998. The coins date from 253 to 295-296. The treasure, in particular, contained several erroneous issues and several rare denominations, including those depicting the usurper emperors Carausius and Allectus.
The treasure was discovered by metal detectorist Colin Roberts on September 10, 1998 and, after a coroner's inquest in December 1998, was declared a treasure.
It was valued at £40,000 and now belongs to the National Museum and Galleries of Wales.
The treasure contained 3,778 silver radiates, including seven denarii, of which just over a third were from Probus's reign (276-282). The last coin was minted around 295-296.
766 coins were minted during the rule of the usurper emperors Carausius and his future assassin and successor Allectus. Coins from these times are rarely found in hoards, and some of them depict Roman warships. Carausius also minted coins with images of Diocletian and Maximian to win favor with them, and in one example all three were on it with the words "Carausius et fratres sui" (Carausius and his brothers). This example has been described as "one of the best copies of this issue ever recorded."
The hoard containing a "significant number" of Allectus quinarii or Q-radiates, combined with the total number of coins of "improved issue" from the reign of Aurelian to that of Diocletian - after the monetary reform of Aurelian - made it an "unprecedented" single deposit from these categories.
Another rare coin, the Divus Nigrinian, was noted as the second recorded British coin.