Short answers, pulled from the story.
Queen Elizabeth I learned of her accession to the throne on the 15th of November 1558 beneath the Queen Elizabeth Oak in the Great Park of Hatfield. This event marked the transition from the reign of Queen Mary I to the beginning of the Elizabethan era.
Robert Cecil, 1st Earl of Salisbury, built the current Hatfield House between 1608 and 1611. The structure was completed in 1611 after Cecil dismantled the original Tudor palace to harvest bricks for the new Jacobean design.
John Tradescant the elder designed the gardens at Hatfield House in the early seventeenth century to include orchards, fountains, scented plants, water parterres, terraces, herb gardens, and a foot maze. These grounds were later neglected in the eighteenth century before restoration efforts began in Victorian times.
Hatfield House served as the location of the first Civil Resettlement Unit during World War II to help repatriated British prisoners of war transition back to civilian life. The King and Queen visited the unit on the 12th of July 1945 to generate significant news coverage.
Hatfield House has been used for filming productions including Batman in 1989, The Crown, and Bridgerton in 2020. The house also served as the setting for Tomb Raider: Underworld, Charlie and the Chocolate Factory in 2005, and The Favourite in 2018.