Pennsylvania Hospital gained a reputation as a center of innovation and medical advancement, particularly in the area of maternity. It was a teaching hospital from its very beginning, when Bond would lead rounds through what is now the east wing of the main building. In its early years it was also known for its particularly advanced and humane facilities for mentally ill patients (at a time when mental illness was very poorly understood and patients were often treated very badly). Care of the mentally ill was removed to West Philadelphia in 1841 with the construction of the Pennsylvania Hospital for the Insane, later known as The Institute of the Pennsylvania Hospital. Under superintendent Thomas Story Kirkbride, the hospital developed a treatment philosophy that became the standard for care of the mentally ill in the 19th century.