explain how the myth of prester john demonstrates euocentrism?

Answer 1

I don't normally quote from wikipedia, but here's part of what they say:

"At first, Prester John was imagined to be in India; tales of the 'Nestorian' Christians' evangelistic success there and of Thomas the Apostle's subcontinental travels as documented in works like the Acts of Thomas probably provided the first seeds of the legend. After the coming of the Mongols to the Western world, accounts placed the king in Central Asia, and eventually Portuguese explorers convinced themselves they had found him in Ethiopia. Prester John's kingdom was the object of a quest, firing the imaginations of generations of adventurers, but remaining out of reach. He was a symbol to European Christians of the Church's universality, transcending culture and geography to encompass all humanity, in a time when ethnic and inter-religious tension made such a vision seem distant."

So he was imagined to be a wise and honorable European surrounded by non-whites. That is, he was personifying the Europeans' dream of converting all those nasty colored folk to Christianity.

Is that what you meant?