John of Salisbury (c. 1120 – 25 October 1180), who described himself as Johannes Parvus ("John the Little"), was an English author, educationalist, diplomat and bishop of Chartres, and was born at Salisbury.
He was of Anglo-Saxon, not of Norman extraction, and therefore apparently a clerk from a modest background, whose career depended upon his education. Beyond that, and that he applied to himself the cognomen of Parvus, "short", or "small", few details are known regarding his early life. From his own statements it is gathered that he crossed to France about 1136, and began regular studies in Paris under Peter Abelard, who had for a brief period re-opened his famous school there on Montagne Sainte-Geneviève.
His vivid accounts of teachers and students provide some of the most valuable insights into the early days of the University of Paris. When Abelard withdrew from Paris John studied under Master Alberic and Robert of Melun. In 1137 John went to Chartres, where he studied grammar under William of Conches, and rhetoric, logic and the classics under Richard l'Evêque, a disciple of Bernard of Chartres. Bernard's teaching was distinguished partly by its pronounced Platonic tendency, and partly by the stress laid upon literary study of the greater Latin writers. The influence of the latter feature is noticeable in all John of Salisbury's works.
Around 1140 John returned to Paris to study theology under Gilbert de la Porrée, then under Robert Pullus and Simon of Poissy, supporting himself as a tutor to young noblemen. In 1148 he resided at the Abbey of Moutiers-la-Celle in the diocese of Troyes, with his friend Peter of Celle. He was present at the Council of Reims in 1148, presided over by Pope Eugene III. It is conjectured that while there, he was introduced by St. Bernard of Clairvaux to Theobald, whose secretary he became.