In
1187, Saladin invaded the kingdom and captured almost everything except the stronghold of
Tyre, held by
Conrad of Montferrat, Baldwin V's uncle. Guy, after his release from captivity, set about
besieging Acre; however, Sibylla and their two daughters died of disease in the camp in summer
1190. Guy continued to call himself king and demanded to be recognised thus, although Isabella was
de jure queen.
Her supporters, notably her mother Maria and Balian of Ibelin, realised that she needed a suitable king - who was not her current husband. This situation was not without precedent: Isabella's father had been forced to divorce his first wife in order to succeed to the throne, and Sibylla had been pressed - but had refused - to have Guy annulled. Humphrey of Toron, whom Isabella liked very much, having practically grown up with him, had no great desire to be king. He had let down her cause in 1186, and was still a staunch supporter of Guy. He was more of a diplomat than a warrior, and even the
Itinerarium Peregrinorum , which was highly sympathetic to him, suggests he was slightly effeminate. In autumn 1190, Maria and Balian abducted Isabella from Humphrey, and forced her to consent to an annulment because she had been under-age at the time of her marriage, and had been coerced by her half-brother, Baldwin IV. They intended to marry her to the ambitious Conrad, who was Baldwin V's nearest male kinsman, and had already proved himself capable politically and militarily.
After much political pressure, and a challenge to a trial by combat by
Guy III of Senlis (which he refused), Humphrey consented to an ecclesiastical annulment by
Ubaldo Lanfranchi, Archbishop of Pisa, who was
Papal legate, and Philip of Dreux,
bishop of Beauvais, who was a second-cousin of Conrad. Philip married Conrad and Isabella on
24 November, despite objections that the marriage was
canonically incestuous (Isabella's half-sister Sibylla having been married to Conrad's older brother). Some modern popular writers have suggested this was a grim fate for the young queen, to be married off to a "grizzled old warrior" (David Boyle,
Blondel's Song (2005), p. 63) who had twice been married before. However, Conrad, then about 45, was an intelligent, well-educated, handsome man of great personal courage and vitality - so perhaps her situation was less bleak than some have implied. She compensated Humphrey by restoring to him his title to Toron, Chastel Neuf and related estates, which had been taken into the royal domain on their marriage, before returning to Tyre with her new husband.
By virtue of his marriage to Isabella, Conrad became
de jure uxoris King of Jerusalem. However, for seventeen months there was an interregnum during which Guy of Lusignan, despite the death of Sibylla, continued his claim. Guy's chief supporter was
Richard I of England, his family's overlord in
Poitou, while Isabella and Conrad's was
Philip II of France, the son of Conrad's cousin
Louis VII. Eventually, after Philip's departure, Conrad's kingship was confirmed by election in April
1192.
The news was brought to the couple in Tyre by Count
Henry II of Champagne, the nephew of both the Kings of England and of France, who then returned to Acre. Only a few days later, on 28 April, Isabella and her ladies were late for dinner through lingering at the
hammam. Conrad called on the Bishop of Beauvais, hoping to dine with him, but finding the bishop had already dined, set off back to the palace. On the way, he was set upon in the street and stabbed by
Hashshashin. He died of his wounds that same day. Isabella was already known to be carrying their first child -
Maria of Montferrat, who later succeeded her mother as queen regnant (see the
Old French Contination of William of Tyre, the
Brevis Regni Hierosolymitani Historia in the Annals of Genoa, and the Muslim chronicler Imad ad-Din al-Isfahani).
Two days later, Henry of Champagne returned to Tyre as the envoy of his uncle King Richard - and immediately betrothed himself to Isabella. According to some chroniclers, the people of Tyre were reportedly so taken by Henry's youth and handsomeness that they shouted that he should marry their princess, and Isabella immediately fell in love with him - but this is to put a romantic gloss on what was primarily a political pairing. Richard had supported Guy, and was suspected of involvement in Conrad's death. A marriage between his nephew and Isabella was more advantageous to him than reinstating Humphrey, despite the latter's objections. Henry and Isabella were married only eight days after Conrad's murder. Imad ad-Din al-Isfahani, who was present for the wedding, wrote:
:
Henry of Champagne married the Marquis' wife on the same night, maintaining that he had first right to the dead man's wife. She was pregnant, but this did not prevent himself uniting himself with her, something even more disgusting than the coupling of the flesh. I asked one of their courtiers to whom paternity would be awarded and he said: "It will be the Queen's child." You see the licentiousness of these foul Unbelievers!
Henry died in
1197 when a balcony or window-trellis gave way and he fell out of a window. He and Isabella had two daughters,
Alice (born
1196) and
Philippa (born 1197). After his death, Isabella was married for a fourth time to
Amalric II of Jerusalem (also Amalric I of Cyprus), brother of
Guy of Lusignan. They had two daughters,
Sybilla (born
1198) and
Melisende (born
1200), and one son, Amalric (
1201–1205). King Amalric died in 1205 of food-poisoning caused by white mullet, shortly before his wife, and shortly after their infant son.
On her death in 1205, Isabella was succeeded as Queen of Jerusalem by her eldest daughter
Maria of Montferrat.
The legality of Isabella's divorce from Humphrey was challenged in
1213, during the dispute over the succession to
Champagne between her daughters Alice and Philippa and Henry's nephew
Theobald IV. However, its validity seems to have been upheld: no challenge was made to the legitimacy of Maria and her descendants to succeed to the throne of Jerusalem, and in Champagne, Theobald bought off his cousins Alice and Philippa.
