the capital of a cognominal circle in the Prussian province of Aix-la-Chapelle, is situated on the Roer, 15 miles N.E. of Aix-la-Chapelle, and 24 miles W. of Cologne. It is strongly fortified, and has a citadel of great strength. Chief manufactures, woollen cloth, leather, and soap. Jülich is the ancient Juliacum, and is said to have been founded by Julius Caesar. Pop. 2890.