'Treves', 1890. Trier formerly known in English as Treves is a city in Germany on the banks of the river Moselle, founded by the Celts in late-4th century BC. The Franks seized Trier from Roman administration in 459. In 870, it became part of Eastern Francia, which developed into the Holy Roman Empire. From "Cassell's Illustrated Universal History, Vol. III - The Middle Ages", by Edmund Ollier. [Cassell and Company, Limited, London, Paris and Melbourne, 1890. ]