The Mauer 1 mandible is the oldest-known specimen of the genus Homo in Germany. It was found in 1907 in a sand quarry in the community Mauer, around 10 km (6.2 mi) south-east of Heidelberg. The Mauer 1 mandible is the type specimen of the species Homo heidelbergensis. Some European researchers have classified the find as Homo erectus heidelbergensis, regarding it as a subspecies of Homo erectus. In 2010 the mandible's age was for the first time exactly determined to be 609,000 ± 40,000 years. Previously, specialist literature had referred to an age of either 600,000 or 500,000 years on the basis of less accurate dating methods.