The Teutoburg Forest is a range of low, forested hills in the German states of Lower Saxony and North Rhine-Westphalia. Until the 17th century, the official name of the hill ridge was Osning. It was first renamed the Teutoburg Forest in 1616 in commemoration of the Battle of the Teutoburg Forest in 9 AD, which most likely took place at Kalkriese instead.
Nearest city: Bielefeld · Paderborn (to the south) · Osnabrück (to the north-west)
Area: c. 4,000 km² (1,500 sq mi) almost all of it included officially in one of two natural parks: · 1,220 km² (470 sq mi) · (TERRA.vita Nature Park) · 2,711 km² (1,047 sq mi) · (Teutoburg Forest / Egge Hills Nature Park)