The Anglican Church began with English Reformation. The English Reformation was in part an associated process with the Protestant Reformation, which was a political and religious movement across Europe. But also, the decline of feudalism, the invention of the printing press.
The main separation occurred when Henry VIII's desire the annulment of his marriage. The Roman Church didn't agree, and Henry VIII's declare that he was the "Supreme Head of the Church of England."
To be accurate from a chronological point of view, the Protestant Revolution started in 1517. Then in 1534, Henri VIII's promoted the Act of the Supremacy.
Henry VIII's was married to Catalina the Aragon, but she wasn't able to give an heir, so, he wanted the divorce or the annulment. He also wanted to get married to Anne Boleyn. But, the Roman Church decline his request, that's when the English Reformation started.
Definition: a preliminary or preparatory statement; an introduction.
US Preamble: The Preamble of the United States Constitution, beginning with the words "We the people ", is a brief introductory statement of the Constitution's fundamental purposes and guiding principles.
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