The College of Physicians was founded by Royal Charter in 1518 after a small group of distinguished physicians led by Thomas Linacre petitioned the King to be incorporated into a College similar to those found in a number of other European countries. The main functions of the College as set down in the founding Charter, were to grant licences to those qualified to practise medicine and to punish unqualified practitioners and those engaing in malpractice. Membership comprises Fellows, Licentiates and from 1859 Members. Membership is by examination, Fellowship by invitation after recommendation by an existing Fellow.