​WETZLAR, a town of Rhenish Prussia; on the Lahn; 95 miles S. E. of Köln. It has a cathedral, built at intervals during the 13th, 14th, and 15th centuries, and still unfinished. Protestants worship in the choir. Catholics in the nave. There are also a gymnasium and a synagogue, and glove factories, spinning, iron works, phosphorus works, etc. Wetzlar is a scene in Goethe's “Werther.” It first appears in history during the 12th century. The Diet of Spires met here from 1689 to 1808. Pop. about 15,000.