What was Catherine of Aragon's relation to Henry VIII?

Catherine of Aragon was indeed the wife of Henry VIII. She was originally married to Henry's older brother, Arthur, and after Arthur's untimely death, she married Henry. Their marriage was significant in English history, as it ultimately led to the English Reformation. Henry VIII sought an annulment of his marriage to Catherine after years of marriage due to her failure to provide him a male heir, which they had hoped would secure the Tudor dynasty. This desire for annulment and subsequent actions by Henry, including the establishment of the Church of England, were pivotal events during the Renaissance and Reformation period.