16th-century Lutheranism

The Reformation, also known as the Protestant Reformation or the European Reformation, was a time of major theological movement in Western Christianity in 16th-century Europe that posed a religious and political challenge to the papacy and the authority of the Catholic Church hierarchy. Towards the end of the Renaissance, the Reformation marked the beginning of Protestantism. It is considered one of the events that signified the end of the Middle Ages and the beginning of the early modern period in Europe.

Patriarch of Constantinople

Lutheran doctrinal standard of 10 authoritative credal documents: Apostles’, Nicene, Athanasian Creeds; Augsburg Confession; Apology of the Augsburg Confession; Small and Large Catechisms; Smalcald Articles; Melanchthon’s Tractate; Formula of Concord

right|thumb|The first page of Abckiria Abckiria (also sometimes spelled ABC-kiria, and spelled "ABC-kirja" in contemporary Finnish), in English "ABC book", is the first book that was published in the Finnish language. It was written by Mikael Agricola, a bishop and Lutheran Reformer, and was first published in 1543. Agricola wrote the book while working on the first Finnish translation of the New Testament (which was eventually finished in 1548 as Se Wsi Testamenti).

the 16th century transition to Lutheranism in the realms ruled by the Copenhagen-based House of Oldenburg

Crypto-Calvinism is a pejorative term describing a segment of those members of the Lutheran Church in Germany who were accused of secretly subscribing to Calvinist doctrine of the Eucharist in the decades immediately after the death of Martin Luther in 1546. It denotes what was seen as a hidden (crypto- from meaning "to hide, conceal, to be hid") Calvinist belief, i.e., the doctrines of John Calvin, by members of the Lutheran Church. The term crypto-Calvinist in Lutheranism was preceded by terms Zwinglian and Sacramentarian. Also, Jansenism has been accused of crypto-Calvinism by Roman Catholi

religious conversion of Hungarians