Kapfenberg, with 22,182 inhabitants in 2023, is the third largest city in Styria, Austria, and lies in the valley of the Mürz near the town of Bruck an der Mur. The town's landmark is Burg Oberkapfenberg. Every year in June, the Ritterfest takes place at the castle, which is one of the largest events of its kind in Austria.

Styria is an Austrian federal state in the south-eastern part of the country. With an area of 16,401 km2 (6,332 sq mi), Styria is Austria's second largest federal state, after Lower Austria. It is bordered to the south by Slovenia, and clockwise, from the southwest, by the Austrian federal states Carinthia, Salzburg, Upper Austria, Lower Austria, and Burgenland. The federal state's capital is Graz. In the European Union's vocabulary, Styria is a province.