Michael Hart, author of The 100: A Ranking of the Most Influential Persons in History, in collaboration with the website Adherents.com, has compiled a list of the religions of the 100 most influential people in history (the criteria for his choices are in the book). Find that list here, and check out the runners up list here.
And since it is campaign season, here's a list of U.S. Presidents and their religious affiliations.
Search around at the Adherents.com site, and see what's there. In your opinion, what's the most interest statistic, or surprising statistic? Why?