Sybilla of Conversano

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Sybilla of Conversano
Spouse(s) Robert Curthose
Noble family Hauteville
Father Geoffrey, Count of Conversano
Died 18 March 1103

Sybilla of Conversano (d. 1103), was a wealthy Italian heiress and Duchess consort of Normandy, as the wife of Robert Curthose, Duke of Normandy.


She was the daughter of Geoffrey of Brindisi, Count of Conversano (and a grandniece of Robert Guiscard.[1][2] During the winter of 1096-97 while Robert Curthose was in Apulia awaiting transport on the First Crusade, he probably began negotiations to marry the heiress, Sibyl of Conversano.[3] Orderic Vitalis claims Robert 'fell in love with Sibyl and further the chronicler called her 'truly good in character' and also wrote she was 'endowed with many virtues and lovable to all who knew her'.[lower-alpha 1][3] On Robert's return from the Crusade he married Sibylla in Apulia[4] in 1100[1]

Shortly after returning to Normandy, Robert and Sybilla undertook a pilgrimage to Mont Saint-Michel to give thanks for his safe return from the Crusade.[5] It is clear that writers of the time were quite taken with Sybilla, praising both her beauty and intelligence.[6] During Curthose's absence, Robert of Torigni noted that the new duchess administered Normandy better than the duke did.[6] On 25 October 1102, their son was born.[7] He was named William for William, Archbishop of Rouen who presided over his baptism, this according to Orderic.[7] William of Malmesbury suggested he was named after his grandfather, William the Conqueror.[7] On 18 March 1103,[8] less than six months after the birth of her only child, she died at Rouen, Caux, and was buried, amid universal sorrow, in the cathedral church, Archbishop William Bonne-Ame performing the funeral rites. Sybilla was admired and often praised by chroniclers of the time; William of Malmesbury claims she died as a result of binding her breasts too tightly while both Robert of Torigny and Orderic Vitalis suggest she was murdered by a group of noblewomen led by her husband's mistress, Agnes de Ribemont.[lower-alpha 2][9]


Robert and Sybilla had one son:


  1. This is somewhat uncharacteristic of Orderic to speak in praise of an aristocratic woman in this manner. See: Marjorie Chibnall, "Women in Orderic Vitalis', The Haskins Society Journal Studies in Medieval History, Volume 2 (1990), pp. 105-21.
  2. Agnes de Ribemont was the widow of Walter Giffard, 1st Earl of Buckingham, and the sister of Anselm de Ribemont, who had died on crusade. It remains unclear if or when she and Robert even had an affair, but the story goes that she promised that if he would marry her he'd have the support of her powerful family. William of Malmsebury loved a good story, even if untrue; and in one version of his Gesta Regum, he credits Sybilla's death to Robert's "mistress", and in a later version he stated "mid-wife". However plausible it may have been that she was Robert's mistress, it remains less than plausible that Robert allowed his new wife, the mother of his infant son, to be poisoned while he sat idly by. Orderic may have seen such a story as further evidence Robert Curthose was unfit to rule Normandy. See: William M. Aird, Robert Curthose Duke of Normandy (Woodbridge: The Boydell Press, 2008), pp. 213-14. The mysterious story also has a chronological problem in that Agnes de Ribemont may not even have been a widow at the time of Sybilla's death. See: Charles Wendell David, Robert Curthose (1920) pp. 146-7. According to Europäische Stammtäfeln, III/4, Tafel 695, Walter died 15 July 1102.


  1. 1.0 1.1 1.2 Detlev Schwennicke, Europäische Stammtafeln: Stammtafeln zur Geschichte der Europäischen Staaten, Neue Folge, Band II (Marburg, Germany: Verlag von J. A. Stargardt, 1984), Tafel 81
  2. Charles Wendell David, Robert Curthose, Duke of Normandy (Cambridge, MA: Harvard University Press, 1920), p. 146 ISBN 1-4326-9296-8
  3. 3.0 3.1 William M. Aird, Robert Curthose Duke of Normandy (Woodbridge: The Boydell Press, 2008), pp. 191-2
  4. François Neveux, The Normans, Trans. Howard Curtis (London: Constable & Robinson, Ltd., 2008), p. 174
  5. Ordericus Vitalis, The Ecclesiastical History of England and Normandy, Trans. Thomas Forester, Vol. III (London: Henry G. Bohn, 1854), p. 272
  6. 6.0 6.1 C. Warren Hollister, Henry I (Yale University Press, New Haven & London, 2003), p. 180
  7. 7.0 7.1 7.2 William M. Aird, Robert Curthose Duke of Normandy (Woodbridge: The Boydell Press, 2008), p. 212
  8. William M. Aird, Robert Curthose Duke of Normandy (Woodbridge: The Boydell Press, 2008), p. 213
  9. Katherine Lack, Conqueror's Son: Duke Robert Curthose, Thwarted King (Sutton Publishing, 2007), p. 153 ISBN 978-0-7509-4566-0

Preceded by
Matilda of Flanders
Duchess consort of Normandy
Succeeded by
Matilda of Scotland