Question

In which area of the world would you have been MOST likely to find widespread practice of Orthodox Christianity in the 16th Century?

Answer 1

It would most likely be in Brazil. 

Answer 2

the answer from my opinion  > Orthodox Christianity in the sixteenth century was a great extension of the exodus of the Russians to Ukraine and Poland, which was the strong force in Europe in the sixteenth century and the spread of the Orthodox in Eastern Europe, Greece and Alexandria in Egypt