On the 19th May 1554, the future Elizabeth I was released from the Tower of London and escorted to Woodstock, where she was put under house-arrest.
As Elizabeth walked out of the royal lodgings of the Tower, she must have thought of her mother, Queen Anne Boleyn, who had been beheaded exactly 18 years ago, on the 19th May 1536. Anne never left the Tower after her arrest, but her daughter lived and became Queen Elizabeth I.
You can read more about Elizabeth’s imprisonment in my article The Imprisonment of Elizabeth.