On 25 May 1553, numerous guests including members of the Privy Council and foreign ambassadors, gathered at Durham Place, the Westminster residence of John Dudley, 1st Duke of Northumberland to witness a triple wedding celebration: the three young brides were Northumberland's youngest daughter Katherine Dudley, and sisters Jane and Katherine Grey, eldest daughters of Henry Grey, 1st Duke of Suffolk.
On This Day (20 April) in 1578, Lady Mary Grey, youngest daughter of Henry Grey, 1st Duke of Suffolk and his wife Frances Brandon, and sister to Lady Jane Grey and Katherine Grey, and widow of Sir Thomas Keyes, died at her London home, in the parish of St Botolph's-without-Aldgate.