Elizabeth Tudor was born at Greenwich on 7 September 1533, the daughter of Henry VIII and Anne Boleyn.

The birth came after one of the most dangerous decisions of Henry’s reign. He had set aside Catherine of Aragon, married Anne and forced a break with papal authority in England. The marriage was a matter of desire and court politics, but it also carried the future of the Tudor succession.

Henry needed a son. The Tudor dynasty was still young, and the memory of the civil war had not faded. A male heir would have made the new marriage look safer and the religious break easier to defend. It would have given Henry the answer he had claimed to need.

Elizabeth was a royal child, born to a crowned queen, but she was a daughter. That was the blunt fact at the centre of the day. Her birth gave Henry another heir, but not the heir he wanted.

For Anne Boleyn, the pressure remained. She had reached the throne in a marriage that had changed the kingdom’s religious and political order, and much of her security still rested on childbirth. Elizabeth’s birth did not remove Anne from favour at once, and it should not be treated as the simple cause of her fall. It left the main problem open. Anne had produced a child, but not the son who could settle Henry’s anxiety.

The birth also changed Mary’s position. Catherine of Aragon’s daughter had already been pushed aside by Henry’s new marriage and the rejection of Catherine’s status as queen. Elizabeth’s arrival made that change visible in the nursery and in law and court ceremonies. Royal legitimacy was being remade around Henry’s will, his marriage and the political needs of the crown.

Elizabeth’s birth was more than a famous beginning. In 1533, she was part of a problem Henry had tried to solve by remarrying. Her early place would soon become even less secure after Anne’s execution, when Elizabeth was declared illegitimate and moved away from the centre of succession.

The latter reversal is hard to miss, but it should not erase the uncertainty of the day itself. The child born at Greenwich was the wrong answer to Henry’s hopes, who became queen in 1558. Her reign would help secure the Protestant settlement, bring a measure of stability after the mid-Tudor years and give the dynasty much of its later image.

On the day she was born, though, none of that was settled. Elizabeth’s birth did not give Henry the son he wanted. It gave him a daughter whose future looked uncertain, and whose later rule would make the disappointment of 1533 look very different.