Pforzheim is a town of nearly 120,000 inhabitants in the federal state of Baden-Württemberg, in the southwest of Germany. It is known for its jewelry and watch-making industry, and as such has gained the nickname "Goldstadt" ("Golden City"). It has an area of and is situated between the cities of Stuttgart and Karlsruhe at the confluence of three rivers (Enz, Nagold and Würm) and marks the frontier between Baden and Württemberg, being located on Baden territory. From 1535 to 1565 it was the home to the Margraves of Baden-Pforzheim.