Missionary Map ProjectContains a bibliography of Protestant missionary atlases in various languages from the early 19th century onward, as well as a list of missionary world maps, including clickable links to online versions. There is also a link to an online exhibition hosted by Utrecht University Library (Special Collections).
World Christian Encyclopedia (Online)Documents the changing status of World Christianity over the past 120 years from historical and social scientific perspectives. Features comprehensive descriptions of all Christian traditions, including current information on the uniqueness of Christian experiences around the world.
World Religion Database: International Religious Demographic Statistics and SourcesThe World religion database contains statistics on religious affiliation for every country of the world. It provides source material, including censuses and surveys, as well as best estimates for every religion to offer a picture of international religious demography. It offers best estimates at multiple dates for each of the world's religions for the period 1900 to 2050.