None. Christianity was developed by Paul (who wrote most of the New Testament). Jesus was born a Jew, trainied as a rabbi, lived and worked in the northern province of Galilee, and only went to...
Revelation 3:20 says,
Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me.
You notice it doesn't say I...
This is not enumerated in the Bible. While the apostles are named and counted as 12, there are no references to how many disciples there were, although we do know they were not all men - the women...