Among the earliest-known clear examples for the practice of trepanation was identified from a Neolithic burial site near the town. Researchers from Freiburg University reported in 1997 an analysis of the well-preserved skeletal remains of an approximately 50-year-old man, whose cranium showed clear evidence of two trepanation procedures. One had fully healed and the other partially so, indicating the subject had survived the operations. The remains were dated to between 5100 and 4900 BC.[1]
