Thousands of years ago, a woman underwent two surgeries to her head — and survived both procedures, her skull reveals.

Scientists in Spain made the discovery after analyzing the woman’s skeletal remains, which were unearthed at a Copper Age burial site known as Camino del Molino, located in Caravaca de la Cruz in southeastern Spain, according to a study published in the December issue of the International Journal of Paleopathology.

The woman, who was between 35 and 45 years old when she died, was one of 1,348 individuals found at the funerary site, which was used from 2566 to 2239 B.C. However, unlike the other skeletons, her skull showed evidence of a series of trepanations, which are surgical procedures that involved drilling or scraping holes through the skull to expose the dura mater, the outermost layer of tissue surrounding the brain and spinal cord, as a form of medical treatment.