John of Salisbury, who described himself as Johannes Parvus, was an English author, philosopher, educationalist, diplomat and bishop of Chartres. The historian Hans Liebeschuetz described him as one of the most notable figures of the "medieval Renaissance" of the 12th century. c. 1110 – November 1, 1180; died at about 70. Alive at the same time as Genghis Khan, Omar Khayyám, Averroes, Bernard of Clairvaux, and Saladin. Wiki link