Al-Kamil al-Ayyubi (Al-Kamil of the Ayyubid Dynasty)

King Al-Kamil al-Ayyubi, ruler of the Levant from 1218 to 1238, is considered one of the most significant rulers in Islamic history who deliberately sought to establish relations of fraternity and cooperation with Christianity, despite the harsh conditions of the Crusades that the region was enduring at the time.

Although historical sources often describe Al-Kamil with great respect as a righteous ruler and successful diplomat, he has also been subject to criticism due to his unconventional stance toward the Crusaders. He established a shared space of cooperation and mutual respect with Christians based on principles of equality and brotherhood.

This can be illustrated through two notable encounters:

Francis of Assisi

Francis of Assisi is considered one of the most famous clerics of the Middle Ages and was later canonized by the Catholic Church. Remarkably, during the Crusades he traveled to the Levant and managed to engage with the Ayyubid Sultan Al-Kamil. He obtained permission from him to establish religious centers for Christians in the Islamic East. Practically, he is regarded as the founder of the Franciscan monastic order, which continues to exist to this day.

Emperor Frederick II

Emperor Frederick II led a major Crusader campaign aimed at capturing Jerusalem. Despite commanding a powerful military force, Al-Kamil chose not to engage in direct confrontation and instead sent word inviting the emperor to meet him.

In an unusual diplomatic encounter, Al-Kamil successfully engaged Frederick in dialogue. Rather than engaging in a devastating war, he proposed an agreement under which the emperor would oversee Christian churches in Jerusalem under Ayyubid sovereignty, allowing Christians full freedom to perform pilgrimages and religious rites in the Holy City.

This settlement was extraordinary and was interpreted by some historians either as political cunning on the part of the Sultan or the Emperor. However, a careful reading of the historical context suggests that what occurred reflected Al-Kamil’s firm belief in interfaith fraternity, a principle he considered essential for governing a religiously and ethnically diverse society.

This historical moment had a lasting impact on the idea of interreligious coexistence. Both rulers possessed the intellectual and political conditions that made such an agreement possible. Frederick II was in conflict with the Pope over imperial authority and ecclesiastical privileges, representing an early reformist and Enlightenment-like challenge to papal dominance in the Middle Ages. Al-Kamil, likewise, believed that war was not a viable solution for conflicts rooted in religion.

Interestingly, Frederick II gained admiration among Muslims, many of whom believed he concealed a favorable attitude toward Islam. His strong opposition to the Pope and his reluctance to participate in Crusader campaigns reinforced this perception. The Pope issued repeated excommunications against him for failing to engage in the Crusades.

It appears that the campaign itself may have been conducted within an understanding or tacit arrangement between Frederick and Al-Kamil. Historian Al-Sallabi notes that Frederick’s success was largely due to his exceptional personality, which brought him closer to Muslims, who respected him deeply. They believed he was inclined toward Islam, spoke Arabic fluently, and embodied a spirit of tolerance and openness toward all religions. Muslims were impressed by his intellectual breadth and his independence from Church authority.

Historian Kantorowicz wrote about the two figures, stating that Al-Kamil was an Eastern reflection of the Emperor, while the Emperor was a Western reflection of the Sultan. The agreement between them marked a turning point in global political thinking, as it demonstrated that peace and conflict resolution through negotiation were possible alternatives to war. The peace established between Islam and Christianity during this period led many to question the necessity of prolonged conflict between the two civilizations.

In 1229, Al-Kamil concluded a treaty granting Frederick control over Christian churches in Jerusalem, with the exception of the area surrounding the Dome of the Rock, which remained sacred to Muslims. Christian pilgrims were permitted to visit and pray in the area associated with the Temple of Solomon, while Muslims were granted similar rights in Bethlehem. The treaty also included the release of prisoners from both sides and established a ten-year truce. During this period, Christian and Islamic cultures coexisted in relative harmony and mutual respect.

Al-Kamil faced strong criticism from some strict religious currents within Islam, which viewed this openness toward Christians as a betrayal of jihad principles and resistance to the Crusaders. Some historical accounts even portrayed him as having “sold Jerusalem.”

However, this portrayal is not accurate. The Sultan was fully aware of his actions and succeeded in balancing the protection of Islamic holy sites with the establishment of peaceful relations with Christians. Frederick II himself repeatedly stated, both publicly and privately, that he owed his arrangements regarding Christian sites in Jerusalem to Sultan Al-Kamil and acted in accordance with his guidance.

Many accounts describe the atmosphere of mutual respect between the German Emperor and Al-Kamil. Frederick was known to refer to himself as a servant of “our master Sultan Al-Kamil.” It is also reported that the Qadi of Nablus temporarily suspended the call to prayer during the emperor’s visit in accordance with the treaty, but Frederick objected, saying that Muslims should not alter their religious practices for his sake. He expressed a desire to hear the Islamic call to prayer and praised its spiritual beauty.

Some historians, such as Al-Ayni, believed that Frederick outwardly displayed goodwill while concealing political motives.

Relations between Emperor Frederick and the descendants of Al-Kamil continued after the Sultan’s death. Their relationship developed beyond political alliance into intellectual and cultural exchange, influenced in part by Frederick’s exposure to the multicultural environment of Sicily. It can be argued that Frederick II contributed indirectly to the early intellectual currents of religious reform in Europe, which later culminated in figures such as Martin Luther in the sixteenth century.

Although there is insufficient evidence to fully define the philosophical worldview of Sultan Al-Kamil al-Ayyubi, rulers are not necessarily expected to be philosophers. However, his advanced awareness in engaging with the Franciscan initiative and his diplomatic openness toward Frederick II—based on shared human values after more than 130 years of conflict—represents a remarkable milestone in human history.