Herstal (hĕr´stäl), Fr. Héristal, commune (1991 pop. 36,451), Liège prov., E Belgium, on the Meuse River, an industrial suburb of Liège. Herstal is the center of Belgium's armaments industry. Other manufactures include motor vehicles, aircraft engines, and electrical equipment. The city was once the residence of the early Carolingian mayors of the palace, including Pepin II, who was born there.
"Herstal." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (March 23, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/herstal
"Herstal." The Columbia Encyclopedia, 6th ed.. . Retrieved March 23, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/herstal