Eisenerz is a market place and old mining town in the Austrian state of Styria, 68 mi (109 km). N.W. of Graz by rail. Pop. (2001) 6,400. It is situated in the deep Erzbach Valley, dominated on the south by the Erzberg 1465m (5030 ft). It has an interesting example of a medieval fortified church, a Gothic edifice founded by Rudolph of Habsburg in the 13th century and rebuilt in the 16th.
At the turn of the past century the Erzberg (Ore Mountain) furnished such rich ore that it was quarried in the open air like stone, in the summer months. There is documentary evidence of the mines having been worked as far back as the 12th century. They afforded employment to two or three thousand hands in summer and about half as many in winter, and yielded some 800,000 tons of iron per annum. Eisenerz was connected with the mines by the Erzberg railway, a bold piece of engineering work, fourteen miles (21 km) long, constructed on the Abt's rack-and-pinion system. It passed through some beautiful scenery, and descends to Vordernberg, an important center of the iron trade situated on the south side of the Erzberg. Eisenerz possesses, in addition, twenty-five furnaces, which produce iron, and particularly steel, of exceptional excellence. Today the Erzberg is home to motocross races.