Rittersgrün is a district of the municipality of Breitenbrunn/Erzgeb in the Erzgebirgskreis in Saxony, Germany. The scattered settlement with around 1600 inhabitants grew up around several hammer mills, which operated on the course of the Pöhlwasser from the 15th to the 19th century and were supplied with ore from numerous surrounding mines. Due to its location on an important Ore Mountain pass, the settlement was repeatedly plundered by passing mercenaries during the Thirty Years' War. After the decline of the hammer mill industry in the middle of the 19th century, the village's economy was dominated by cardboard and sawmills. In 2007, Rittersgrün was incorporated into Breitenbrunn/Erzgeb. Today, Rittersgrün is primarily known as an excursion and winter sports resort. The main attractions include the Saxon Narrow Gauge Railway Museum and a well-developed network of hiking trails.