In 1187,
Saladin invaded the kingdom, and when Guy marched out to meet him, he asked Heraclius to march along with him at the head of the army with the
relic of the
True Cross. As Heraclius was ill, the
bishop of Acre took his place. Despite the relic, Saladin inflicted a crippling defeat on them at the
Battle of Hattin on July 4, capturing the king. Heraclius' report of the battle and its immediate aftermath, addressed to
Pope Urban III, survives; according to the
Chronicle of Ernoul "Pope Urban, who was at Ferrara, died of grief when he heard the news". In the letter, he said that, without external aid, both Jerusalem and Tyre would fall within six months. In
Jerusalem Heraclius urged
Balian of Ibelin to lead the defence of the city against Saladin. He ordered the stripping of the silver from the edicule in the
Church of the Holy Sepulchre to strike coins with which to pay the city's defenders. But Jerusalem was finally
forced to capitulate on October 2. It was Heraclius who advised Balian to come to terms rather than fight to the death, which, he argued, would condemn the city's women and children to slavery and forced conversion. Heraclius helped Balian negotiate the surrender with Saladin, who allowed him and most of the other Christians leave the city unharmed. He and Balian had organised, and contributed to, a collection of 30,000 bezants to ransom the poorer citizens. This paid the ransoms for about 18,000 people, but another 15,000 people still needed to be paid for. Heraclius and Balian offered themselves as hostages in exchange for them, but Saladin refused, and so these remaining citizens were enslaved. The two men led the last party of refugees from the city at the end of the 40-day ransom period (mid-late November). Saladin's secretary
Imad al-Din al-Isfahani claimed that Heraclius stripped the gold reliquaries from the churches on the Temple Mount, and carried away cartloads of treasure with him. After the capture of Jerusalem, Heraclius sought refuge in
Antioch, together with the queen. He then took part in the
Siege of Acre, where his arrival heartened the army. Like so many others, he died of disease during the
Third Crusade in the winter of 1190–1191. ==Fiction==