== Protestant Groups ==
*1517 ''Lutheran Church'' founded by Martin Luther, nailing his Ninety-Five Theses to door at Wittenburg, sparking Protestant Reformation.
*1525 ''Anabaptism'' established; (today's descendants include
particularly the Amish, Hutterites and Mennonites).
*1534 ''Church of England'' (Anglicanism) founded by King Henry VIII.
*1541 ''Calvinism'', (the ''Reformed tradition'', the ''Reformed faith'', or ''Reformed theology'') founded, as the French theologian Johannes Calvinus establishes the first Reformed church in Geneva.
*1925 ''United Church of Canada'', the second-largest Christian denomination in Canada after the Roman Catholic Church, is founded as a merger of four Protestant denominations.
*1957 ''United Church of Christ'' (UCC) is a mainline Protestant Christian denomination principally in the United States, generally considered within the Reformed tradition, formed in 1957 with the union of the ''Evangelical and Reformed Church'' and the ''Congregational Christian Churches''.