High Quality Content by WIKIPEDIA articles! First published as the Federal Council Year Book in 1916, The Yearbook of American & Canadian Churches is a comprehensive descriptive and statistical listing of major religious bodies and other important religion-related organizations in the U.S. and Canada. The Yearbook contains descriptive information about the major religious bodies in the U.S.A. and Canada, including features of their ecclesiology, history and theological principles, membership and financial statistics, official periodicals published by each religious group, as well as listings of each group's current officers. The Yearbook's data serves as an authoritative source for the United States Census Bureau's ranking of largest religious groups, and for the Encyclopaedia Britannica's listing of largest churches in the U.S.A. A historic archive compact disc was produced in 2000 which compiles previous editions' statistics for comparative and longitudinal analysis.