The Senior Physicians Society (previously called The Quincentennial Society) is an association that provides for widows and widowers of fellows and members of the RCP and retired fellows and members of the RCP and its faculties, an opportunity to contribute to the activities of the RCP and enjoy the scientific, cultural and educational meetings to which selected speakers are invited.

Lectures are now opened to the public. They are usually held three times a year, and attract outstanding speakers across science, the arts, the humanities and issues of the day.