The Royal College of Physicians is a professional membership organization for medical practitioners in the United Kingdom. Founded in 1518, it is one of the oldest medical organizations in the world. The College works to promote excellence in medical practice, education and research, and to advocate for the highest standards
From Wikipedia
The Royal College of Physicians (RCP) is a British professional membership body dedicated to improving the practice of medicine, chiefly through the accreditation of physicians by examination. Founded by royal charter from King Henry VIII in 1518, as the College of Physicians, the RCP is the oldest medical college in England.