The search was continued by European explorers and missionaries as they traveled through China. During the 3rd Crusade, John of Joinville, the chief chronicler for Louis IX of France, wrote of two envoys where were sent to Kuyuk Khan, bearing with them a chapel..
Nestorian missionaries converted the Keraits, along with the Naiman and Merkit tribes, early in the 11th century. These Asian Christians became very different theologically from their counterparts in the West, and were perceived as a mythical cult. From this perception grew the fantastical legend of Prester John.