The Royal College of Physicians (of London) is a British professional body of doctors of general medicine and its subspecialties. It was originally founded as the College of Physicians when it received a Royal Charter in 1518 from Henry VIII of England, affirmed by Act of Parliament in 1523; it is not known when the name "Royal College" was first assumed or granted, but it was finally legally confirmed only in 1960 (by the Royal College of Physicians of London Act, which was primarily required in order to move the premises of the College outside of the Cities of London or Westminster to Regent's Park). The college has been continuously active in improving the practice of medicine since its foundation, primarily though the accreditation of physicians.