"The largest freely available archive of online books about religion, mythology, folklore and the esoteric on the Internet. The site is dedicated to religious tolerance and scholarship, and has the largest readership of any similar site on the web."
"The goal of this website is to provide free, reliable information — "just the facts" — on the various answers that have been given to these questions, as well as the rituals and customs that go along with them."
World religion data in this dataset is from the World Religion Database.The map shows the percentage of the majority religion by provinces/states and also included in the database is Christian percentage by provinces/states. Boundaries are based on Natural Earth, August, 2011 modified to match provinces in the World Religion Database. From Harvard University.