We just learned about the Saint David.
There were a lot of Christian nations in 600 AD.
Around 325 AD there had been a lot of people going around telling people about God and Jesus, but there were only some spots around the Middle East, Europe and Africa.
By 600 AD, Christianity was in Europe at Great Britain, France, Spain, Greece and more.
It was in the Middle East through Turkey, Syria, Lebanon, Israel and more.
And it was in Africa at parts of Egypt, Libya, Tunisia, Algeria and Morocco.
(from: wikipedia - christianity in the 7th century)
Kid Facts - Blast from the past: Didache - The Teaching of the Twelve Apostles