The triens (plural trientes) was an Ancient Roman bronze coin produced during the Roman Republic valued at one-third of an as (4 unciae). The most common design for the triens featured the bust of Minerva and four pellets (indicating four unciae) on the obverse and the prow of a galley on the reverse. It was not a common denomination and was last struck c. 89 BC.

Rome. Circa 241-235 BC. Æ Aes grave Triens (107.00 g)
Triens: O/ Minerva, four pellets above; R/ prow of a galley left, four pellets below

Later, in Frankish Gaul, the term "triens" was often used for the tremissis, since both terms meant "a third".

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