Homo steinheimensis ("Prehistoric Man of Steinheim") is the name for a fossil skull that was found on July 24, 1933, in Steinheim an der Murr in the middle of a 15-meter-high gravel wall of the Sigrist gravel pit by Karl Sigrist during gravel mining. The skull probably belonged to a 25-year-old woman who lived in the Holstein interglacial, i.e. more than 300,000 years ago.