Ger. Trier, anc. Augusta Trevirorum, a town of Prussia, capital of a government in the province of the Rhine, in a rich valley on the Moselle, here crossed by a stone bridge of eight arches 690 feet long, 60 miles S.W. of Coblenz. It consists of the town proper, enclosed by walls and entered by eight gates, and nine suburbs. Its form is oblong, and it includes within its limits many large gardens. The streets are narrow and irregular, and the houses but indifferently built. The cathedral of St Peter and St Helena is an irregular Byzantine edifice, and contains pillars supposed to have belonged to an original edifice of the empress Helena. A more elegant church is that of Our Lady, in pure Gothic, of which it is one of the earliest specimens. The Episcopal palace, now used for barracks, is a large and handsome edifice, partly erected on the site of a Roman building of which there are still some remains. Treves is chiefly remarkable for its Roman antiquities, in which it is the richest town north of the Alps. Besides those already mentioned, there is a gate of the city, and remains of extensive baths, and an amphitheatre at a little distance. The former university has been degraded to a gymnasium, which has a valuable library, including, among other curiosities, the Codex Aureus, given to the abbey of St Maximin by the sister of Charlemagne. There are also various other schools, a museum, theatre, convents, hospitals, &c. Linen, woollen, and cotton fabrics are made; small vessels are built; and some trade in wine, corn, and timber is carried on. In the time of Julius Caesar, Treves was a large and important town, the capital of the Treviri; and under Augustus it was made a Roman colony. At a later period it rose to such prosperity as to be reckoned the second capital of the empire. It was almost destroyed by the irruptions of the Barbarians, but it revived under the archbishops, who were powerful princes and electors of the German empire. Treves was taken by Marlborough in 1704, and suffered much in the wars of the French Revolution. Pop. 19,639.