Mariette Helena, Baroness Saye and Sele, who who died 6 April, 2026, aged 90, was the widow of the 21st Baron Saye and Sele, and was for many years chatelaine of the family seat, Broughton Castle.
She was born in January, 1936, daughter of Major-General Sir Guy Salisbury-Jones, GCVO, CMG, CBE, MC (1896-1985), and his wife the former Hilda Violet Helena de Bunsen (1900-1995), scion of the de Bunsen baronets; and married at St Margaret's, Westminster, 4 December, 1958, the Hon Nathaniel Thomas Allen Twisleton-Wykeham-Fiennes (born 22 September, 1920 in a grace and favour apartment in the House of Lords). Her husband discarded his triple-barrelled surname (encapsulating various family cognomens), shortening it to Fiennes by deed poll in 1965. He succeeded his father in the peerage, 21 October, 1968.
Lord Saye’s forebears could be traced back to the Norman Conquest. An ancestor, Geoffrey de Say, was one of 25 barons who signed the Magna Carta and was charged with its implementation. Another ancestor, James Fiennes, fought at Agincourt and befriended the young Henry VI, serving as chamberlain of his household; he was elevated to the peerage as the 1st Baron Saye and Sele in 1447, but his wealth and influence made him a target of the Kentish rebels under Jack Cade in 1450 when he was imprisoned and beheaded.
The 2nd Lord Saye and Sele married a descendant of William of Wykeham, Bishop of Winchester. As a result the family inherited a fortified manor house in Oxfordshire, for which in 1406 Sir Thomas Wykeham, William’s great nephew, had obtained a licence to “crenellate and embattle”. So emerged Broughton Castle, which Richard Fiennes, the 6th Lord Saye and Sele embellished into what is still essentially the Elizabethan mansion that stands today.
The family played a significant role in the English Civil War. The 8th baron became a leader of the Parliamentarian opposition to Charles I, alongside John Pym. In 1642 his four sons all fought against the royalists at Edgehill, the first major battle of the war, just seven miles from Broughton Castle. His second son, Nathaniel Fiennes, MP for Banbury, was notable for his calls for the abolition of the episcopacy. As an officer in the parliamentary army he led the defence of Bristol against Prince Rupert in 1643. When the city surrendered he was arrested, sentenced to death and later pardoned. Nathaniel remained close to Oliver Cromwell and attended his death bed. At the Restoration he and his father were pardoned for their parliamentary sympathies.
When her husband succeeded to the ancient barony of Saye and Sele in 1968 as the 21st incumbent, he also inherited the moated Broughton Castle, set in an 1,800-acre estate, near Banbury in Oxfordshire. Described by Sir Nikolaus Pevsner, a historian, as “the finest and most complete medieval house in the county”, the actual building, which had been in his family for about 600 years, had deteriorated badly. After his father had restored the roof in 1957, the new lord and his wife Mariette overhauled the stonework and windows, and carried out extensive redecoration. He was helped by his training as a chartered surveyor and land agent.
In the early Eighties she and her husband embarked on the main structure, with a £1 million, 12-year programme, supported by English Heritage and completed in 1994. Crumbling stonework, rotting window lead and timbers riddled with deathwatch beetles were all replaced. Broughton provided the backdrop to scenes in [Shakespeare in Love,] Wolf Hall and The Crown, and the discovery on the estate of one of the largest Roman villas in Britain prompted a visit by Channel 4’s Time Team in 2021.
The 21st Baron Saye and Sele lived to a great age and died 20 January, 2024, aged 103.
Lady Saye and Sele leaves issue, two sons, Martin, the 22nd Baron Saye and Sele (born 27 February, 1961), the Hon William Fiennes (born 7 Aug, 1970), and one daughter, the Hon Susannah (born 27 Feb, 1961 twin with her brother). She was predeceased by two sons, the Hon Richard (1959-2001), and the Hon Thomas (1965-68).
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