With Raymond now a spent force, the Church had only one place left to tackle that openly defied them: the Pyrenean fortress of Montsegur, the so-called ‘Synagogue of Satan’ that had been a Cathar stronghold ever since the days of Innocent’s ‘peace and faith’ campaign. At a council at Beziers in the spring of 1243, it was decided that action against Montsegur had to be taken. By the end of May, an army led by Hugh of Arcis, the royal seneschal in Carcasonne, was in place at the foot of Montsegur, but given the fortress’s reputation for impregnability, they knew they would be in for a long wait.
Montsegur had been refortified in 1204 by Raymond of Pereille. He was a Believer, and both his mother and mother-in-law were Perfect. The castle had been a refuge for Cathars during the Albigensian Crusade, and when the Inquisition began its work, Guilhabert de Castres, the Cathar bishop of Toulouse, approached Raymond with the request that the castle become the centre of the faith. By the time Guilhabert died (of natural causes) around 1240, it was home to around 200 Perfect, overseen by Guilhabert’s successor, Bertrand Marty. They were protected by a garrison of 98 knights, under Peter Roger of Mirepoix, whom Raymond of Pereille had appointed colord of Montsegur at some point prior to 1240. Raymond had guessed — rightly — that the community would need armed protection as the noose of the Inquisition tightened around the Languedoc. Peter Roger, who was from a family of Cathar Believers, had more in common with the bellicose Paulicians than the pacifist Perfect: he was not averse to armed robbery in order to keep the community fed, and had been the instigator of the assassinations at Avignonet. During its heyday, Montsegur had been busy as a centre of both intense devotion and industry. Pilgrims travelled great distances to hear the Perfect preach, to be consoled, or simply to spend time in retreat. When not busy with tending to the needs of the Believers, the Perfect helped support the community by working as weavers (a craft long associated with heresy), blacksmiths, chandlers, doctors and herbalists. By the time the siege began, the total number of people living there — including the knights’ families — was somewhere in the region of 400.
Hugh of Arcis did not have enough men to encircle the two-mile base of the mountain, and in such craggy terrain siege engines were useless. Hugh had no choice but to try to take the fortress by direct assault. His forces made numerous attempts to scale the peak, but each time were driven back by arrows and other missiles lobbed over Montsegur’s ramparts by Peter Roger and his men. The months dragged on wearily and, by Christmas, Hugh’s army was becoming disillusioned. He needed a breakthrough if there was any chance of raising morale. He ordered an attack on the bastion that sat atop the Roc de la Tour, a needle of rock at the eastern end of the summit. The men climbed the Roc by night, and caught the garrison at the top by surprise. The defenders were all killed. When daylight came, the royal troops looked down in horror at the sheer face they had scaled, swearing they could never have made the ascent by day. Nevertheless, it gave the royal forces a strong foothold just a few hundred yards from the main castle itself, and work began immediately on winching up catapults and mangonels. Bombardment began immediately.
Inside the walls of Montsegur, the atmosphere of devotion intensified. While Peter Roger’s men returned fire on the French troops, who were edging ever nearer from their foothold at the Roc, Bertrand Marty and Raymond Agulher, the Cathar bishop of the Razes, attended the spiritual needs of both the garrison and the non-combatants. A messenger arrived to say that Raymond VII might intervene to lift the siege. Rumour had it that Frederick II was also planning a rescue mission to liberate Montsegur. The weeks dragged on, but no one came. Finally, on 2 March 1244, Peter Roger walked out to announce the surrender of the fortress to Hugh of Arcis. The victors were lenient with their terms: everyone could go free, provided they allowed themselves to be questioned by the Inquisition, and swear an oath of loyalty to the Church. Past crimes, including the assassinations at Avignonet, were forgiven. For the Perfect, the choice was as stark as it had been for their forebears at Minerve and Lavaur: renounce Catharism, or burn. They had two weeks to think about it.
For the Perfect, it was no choice at all. Not one of their 200-strong number was willing to recant. They spent the two weeks of the truce distributing their goods to their families and followers. Peter Roger was given 50 doublets that the Perfect had made to sell or give away as he saw fit. The atmosphere inside the castle during this period must have been indescribable, a sorrow touched with the joy in knowing that, for the Perfect, their journey through the vale of tears that is the material world would soon be over. On the final Sunday of the truce, 21 Believers — some of whom had originally gone to Montsegur merely as mercenaries to help Peter Roger defend the castle, and all of whom had the option of going free — asked to be given the consolamentum. They knew that in doing so, they were giving themselves up to the pyres already being built at the foot of the mountain. If there is anything in the entire history of Catharism that illustrates the appeal and power of the faith, it is this extraordinary moment. All of them were consoled.
At first light on Wednesday, 16 March 1244, Montsegur was evacuated. Peter Roger and his knights and their families went free, watching as the Perfect were lashed together on the pyres. They were from all walks of life:
Corba of Pereille and her daughter Esclarmonde were nobles (as well as being Raymond of Pereille’s wife and daughter), while William Garnier was, if not a peasant, certainly a man of humbler means than the Pereilles. The 21 last-minute converts were also among their number, as were Bertrand Marty and Raymond Agulher. Hugh of Arcis and Peter Amiel, the Archbishop of Narbonne, looked on as the pyres were lit. The site of the burnings is still known to this day as the Field of the Cremated.