The Thirty-Nine Articles of Religion are the historically defining statements of doctrines of the Church of England with respect to the controversies of the English Reformation. First established in 1563, the articles served to define the doctrine of the Church of England as it related to Calvinist doctrine and Roman-Catholic practice.[1] The full name for the articles is commonly abbreviated as the Thirty-Nine Articles or the XXXIX Articles.
At the time, the Church of England was searching its doctrinal position in relation to the Roman-Catholic Church and the continental Protestant movements. A series of defining documents were written and replaced over a period of 30 years as the doctrinal and political situation changed from the excommunication of Henry VIII in 1533, to the excommunication of Elizabeth I in 1570.
source: wikipedia.org/wiki/Thirty-nine_Articles//cce.org/c/cofe/39articles/index.html