TED-Ed Lesson on Prester John

In 1165, copies of a strange letter began to circulate throughout Europe. It spoke of a fantastical realm, containing the Tower of Babel and the Fountain of Youth— all ruled over by the letter’s mysterious author: Prester John. Who was this powerful ruler, and was he even real? Matteo Salvadore shares the legend of a mythical king who impacted the decisions of European leaders for 400 years.