JULIERS, a duchy in the circle of Westphalia, in Germany, seated between the rivers Maese and Rhine, and bounded by Prussian Guelderland on the north, by the electorate of Triers on the south, by the electorate of Cologne on the east, and by the Netherlands on the west. It is about 60 miles long, and 30 broad; and is a very plentiful country, abounding in cattle, corn, and fine meadows, and is well supplied with wood; but it is most remarkable for a fine breed of horses, and wood for dyeing, which is gathered here in abundance. The chief towns are Juliers, Aix-la-Chapelle, Duren, Munster-Eifel, Bedbur, Wesinburgh, and Lasteren. The duchy of Juliers is now annexed to France, and forms part of the department of the Roer.