Baldwin IV, the Leper King, and the Templars

• Templar Uniform Editorial
• October 23, 2026
• Categories: History & Lore
• Tags: Knights Templar, Templar History

In November 1177 a sixteen-year-old king who could no longer feel his own hands led a few hundred knights against Saladin’s invading army and shattered it. Baldwin IV of Jerusalem had leprosy. He would be dead at twenty-four. And the battle of Montgisard is one of the most lopsided victories in crusader history.

Roughly eighty Knights Templar rode in that charge. Baldwin’s short reign is where the Order looks least like a conspiracy and most like what it actually was — the standing professional core of a kingdom with almost no manpower.

A king diagnosed on a playing field

Baldwin’s illness was spotted in childhood, and we know how because his tutor wrote it down. William of Tyre, later archbishop and the great chronicler of the kingdom, noticed that the boy playing with his companions did not cry out when they pinched or hurt his arm. William tested him, found the arm had lost sensation, and understood what it meant.

Leprosy in the twelfth century was a social death sentence as much as a medical one. That Baldwin was crowned anyway, at thirteen in 1174, says a great deal about the kingdom’s position: there was no one else. His father Amalric was dead, his heir was a sister, and Jerusalem was surrounded.

One correction worth making, since the film version is now better known than the history: there is no evidence Baldwin wore a silver mask. That is an invention of Kingdom of Heaven. The sources describe bandaged hands and progressive disability, not a mask.

Montgisard, 25 November 1177

Saladin invaded from Egypt that autumn with a large army, believing the kingdom’s forces were occupied in the north. He was substantially right. Baldwin had perhaps 375 to 500 knights available — the figures vary in the sources — against a force that every account agrees was many times larger.

The Templar contingent is the detail that matters here. A body of brothers, usually given as around eighty knights under Grand Master Odo de St Amand, had been shut up in Gaza, which Saladin bypassed. Baldwin collected them on the march.

What followed was not clever manoeuvre. Saladin’s army, confident and strung out while foraging, was caught near Montgisard in the coastal plain. The True Cross was carried with the Christian force, and Baldwin — who by this stage had difficulty holding a rein — is described as dismounting to pray before the charge and being lifted back into the saddle.

The Frankish heavy cavalry went in against an army not formed to receive it, and that is the one thing twelfth-century armies could not absorb. Saladin’s force broke. He escaped on a racing camel with a fraction of what he had brought.

Why eighty Templars mattered that much

The arithmetic of the Latin Kingdom explains the Order better than any legend. Jerusalem could field only a few hundred knights in total. Secular knights held fiefs, had their own interests, went home, aged, died and left minors as heirs.

The Templars had none of those problems. They were permanently resident, permanently equipped, under a single command, and replaced from Europe as they died. Eighty of them were not eight per cent of an army — they were a reliable, pre-formed shock unit in a force otherwise assembled from whoever could be summoned.

That is also why the Order’s discipline about never leaving the field while the banner flew had such military value. Heavy cavalry works only if it does not break first.

The reign after the victory

Montgisard did not save the kingdom, and Baldwin knew it. Saladin rebuilt. The king’s body failed steadily — by the early 1180s he was blind and could not walk, and was carried in a litter on campaign, still commanding.

His real achievement was holding the kingdom together while dying, against a succession crisis he could not solve. He had no children. His heir was his nephew, a child who reigned briefly as Baldwin V and died. The crown then passed to his sister Sibylla and her husband Guy of Lusignan — and Guy led the army to annihilation at Hattin in 1187, two years after Baldwin’s death.

The contrast is the point most commentators draw, and it is fair: the leper king never lost a major engagement, and the healthy king who followed him lost the kingdom in a single afternoon. Saladin’s long campaign finally succeeded against a stronger body and a weaker head.

What the Templars thought of him

The Order’s relationship with Baldwin was not uncomplicated. Odo de St Amand, the Grand Master at Montgisard, was by most accounts a difficult and arrogant man; William of Tyre loathed him and said so. The Templars under him clashed with royal authority more than once, as the Order’s exemption from local jurisdiction allowed them to do.

But in the field the arrangement worked. Baldwin needed troops who would hold; the Templars needed a kingdom to defend. Montgisard is what that bargain looked like on its best day.

Courage as a discipline

Baldwin IV is remembered because of the gap between what his body could do and what he did anyway. He could not feel a wound, could not grip a sword properly at the end, and went out with the army regardless, because there was no one else to go.

That is a specific kind of courage — not the absence of fear but the refusal of an excuse that everyone would have accepted. It is the quality the Order’s own mottoes keep circling, and the reason a sixteen-year-old’s charge at Montgisard still gets told eight centuries later.

The other order: knights with leprosy

Baldwin’s illness connects to a part of crusader history that almost never gets told. The Latin Kingdom had a military order specifically for leprous knights: the Order of Saint Lazarus, based at a house outside the walls of Jerusalem.

It began as a leper hospital and acquired a military function over the twelfth century. Knights from the other orders — Templars included — who contracted leprosy could transfer to it rather than simply be discarded. The Templar Rule itself addresses the situation, directing that a brother who became leprous should be encouraged to join the Order of Saint Lazarus.

These were men who had, by the standards of their society, already died. Their reputation was for fighting with a recklessness that other commanders found alarming, which is not hard to understand. At La Forbie in 1244, a catastrophe that destroyed much of the kingdom’s remaining strength, the Lazarite contingent was effectively wiped out.

So Baldwin IV was not quite the anomaly he appears. He was the most prominent figure in a kingdom that had already built an institution around the proposition that a man with leprosy could still be useful on a horse — a grim practicality that says as much about the crusader states’ manpower crisis as it does about their charity.

The short answer

Baldwin IV became King of Jerusalem at thirteen, already diagnosed with leprosy, and died at twenty-four. On 25 November 1177 at Montgisard he routed a far larger army under Saladin with roughly 375–500 knights, including about eighty Templars under Grand Master Odo de St Amand, collected from Gaza on the march. He never lost a major battle. The silver mask is from the film, not the sources.