Köflach is a small city in the district of Voitsberg in Styria, Austria, at the foot of the Stubalpe mountain. The town has a population of roughly 10,000 and contains a federal stud in the village of Piber that supplies the Lipizzaner horses to the famous Spanish Riding School in Vienna. Traditionally known for its coal mining, Köflach is slowly changing from an industrial town to a center of the service sector. It is connected by rail to Voitsberg.