Solingen is a city in North Rhine-Westphalia, Germany. It is located on the river Wupper, approx. 20 km east of Düsseldorf and 15 km south of Wuppertal. With a population of c. 162,000, it is the fourth-largest city in the Bergisches Land. The city is best known for its knives, scissors, razors, and other steel products. Solingen is also called the "City of Blades" (German: Klingenstadt).