Dr. J. Marion Sims is considered the father of modern gynecology. But this honor comes at a heavy price: Sims carried out his experiments on African-American slave women. It cannot be overstated that these experiments were performed without consent of the patients.

From 1845 to 1849, Sims practiced his methods on 12 slave women who suffered from vaginal issues. In his records, three women reoccurred: Anarcha, Betsy and Lucy #SayTheirNames. Though we don’t know exactly how many operations he performed (and subsequently botched), Sims operated on Anarcha 13 times before successfully repairing her fistula.

Obviously, this is an extremely important and painful part of history, and it should never be repeated. On Tuesday, after 84 years, Central Park removed the statue of Sims. The statue will later be set up in Brooklyn’s Green-Wood Cemetery.