SIEGBURG, zēg'bōōrK. A town of the Rhine Province, Prussia, at the meeting of the Agger and Sieg, 16 miles by rail southeast of Cologne (Map: Germany, B 3). The Benedictine abbey (1060) is now used as a prison. Siegburg is a manufacturing and mining town. It has a royal projectile factory, pottery works, lignite mines, and stone quarries. Population, in 1900, 14,162. Siegburg was a wealthy and prosperous city in the Renaissance period, and famous for the curious and artistic ‘Siegburg pitchers.’