From the twelve, the group grew to 120 by Ascension Day. A little over a week later, on Pentecost, it increased to over 3,000. By the time the last of the twelve died, there were an estimated half-million followers of Jesus Christ. That was the end of the first century. By the end of the second century, this number had increased to almost ten million. By the end of the third century, all heathen temples were destroyed or converted into church sanctuaries. By the close of the ninth century, there were 100 million Christians. Today, the number has grown to over one billion believers around the world. None of this growth would have been possible had Christians not been excited and supportive of missions or prayed to "the Lord of the harvest to send out laborers into his harvest."