Marian persecutions in the context of "Henry VIII"

Mary I (18 February 1516 – 17 November 1558), also known as Mary Tudor, was Queen of England and Ireland from July 1553 and Queen of Spain as the wife of King Philip II from January 1556 until her death in 1558. She made vigorous attempts to reverse the English Reformation, which had begun during the reign of her father, King Henry VIII. Her attempt to restore to the Church the property confiscated in the previous two reigns was largely thwarted by Parliament but, during her five-year reign, more than 280 religious dissenters were burned at the stake in what became known as the Marian persecutions, leading later commentators to label her "Bloody Mary".

Mary was the only surviving child of Henry VIII by his first wife, Catherine of Aragon. She was declared illegitimate and barred from the line of succession following the annulment of her parents' marriage in 1533, but was restored via the Third Succession Act 1543. Her younger half-brother, Edward VI, succeeded their father in 1547 at the age of nine. When Edward became terminally ill in 1553, he attempted to remove Mary from the line of succession because he supposed, correctly, that she would reverse the Protestant reforms that had taken place during his reign. Upon his death, leading politicians proclaimed their Protestant cousin, Lady Jane Grey, as queen instead. Mary speedily assembled a force in East Anglia and deposed Jane.

Katherine Brandon, Duchess of Suffolk, suo jure 12th Baroness Willoughby de Eresby (née Willoughby; 22 March 1519 – 19 September 1580), was an English noblewoman living at the courts of King Henry VIII, King Edward VI, Queen Mary I and Queen Elizabeth I. She was the fourth wife of Charles Brandon, 1st Duke of Suffolk, who acted as her legal guardian during his third marriage to Henry VIII's sister Mary. Her second husband was Richard Bertie, a member of her household. Following Charles Brandon's death in 1545, it was rumoured that King Henry had considered marrying Katherine as his seventh wife, while he was still married to his sixth wife, Catherine Parr, who was Katherine's close friend.

An outspoken supporter of the English Reformation, she fled abroad to Wesel and later the Grand Duchy of Lithuania during the reign of the Catholic Queen Mary I, to avoid persecution.