On January 16, 1120, in the city of Nablus in the crusader Kingdom of Jerusalem, a gathering of ecclesiastical and secular lords produced one of the most remarkable legal documents of the medieval world. Known to history as the Council of Nablus, this assembly was convened jointly by Warmund, Patriarch of Jerusalem, and King Baldwin II of Jerusalem, and it resulted in the establishment of twenty-five canons governing both religious and civil life in the kingdom.
The council was unusual in its dual nature. It was not purely a church council, nor was it simply a meeting of the royal court. The historian Hans Mayer observed that, given the strongly religious character of many of its canons, it can be understood as both a parlement and an ecclesiastical synod. The agreement between the patriarch and the king that emerged from the proceedings was essentially a concordat, comparable in structure to the Concordat of Worms concluded two years later in 1122. Above all, the Council of Nablus produced the first written laws for the Kingdom of Jerusalem.
The political context that prompted the gathering was dire. According to the canons themselves, Jerusalem had been afflicted by plagues of locusts and mice for four consecutive years, and the crusader states were suffering persistent military pressure from Muslim forces in the surrounding region. The assembled lords interpreted these calamities in the theological language of the age: the sins of the Latin population needed to be corrected before divine favor could return and the kingdom could prosper.
The canons addressed a wide range of offenses and obligations. The first three dealt with tithes owed to the church. Canon 1 recorded a formal promise by King Baldwin II to surrender appropriate tithes to the Patriarch from his royal estates in Jerusalem, Nablus, and Acre. In canon 2, the king sought forgiveness for tithes he had previously withheld, and canon 3 recorded the Patriarch's absolution of that sin. This sequence was significant: it demonstrated that even the king of Jerusalem was subject to the authority of the church in financial matters, a visible assertion of ecclesiastical rights at a moment when the Investiture Controversy was still convulsing Europe.
Canons four through seven confronted the crime of adultery in blunt and unsparing detail. A man merely suspected of committing adultery with another man's wife was first to be forbidden from visiting that woman; if he persisted, he was to undergo the ordeal of hot iron to prove his innocence. Should he be found guilty, canon 5 decreed castration followed by exile. The adulterous woman faced mutilation of the nose, a punishment of Byzantine origin, unless her husband chose to forgive her, in which case both parties were to be exiled together. Canon 6 extended similar provisions to clerics who might find themselves suspected in like circumstances.
The council is also believed to have been the occasion on which Hugues de Payens received permission from both Baldwin II and Warmund to found what would become the Knights Templar, one of the most famous military-religious orders of the crusading era.
Strikingly, the council was not mentioned by Fulcher of Chartres, who served in Baldwin II's retinue and was almost certainly present. Scholars believe his silence was deliberate: the canons, which addressed the moral failings of the Latin population in frank terms, contradicted his idealized portrayal of the Kingdom of Jerusalem as a Christian utopia. William of Tyre, writing roughly sixty years after the event, described the proceedings in detail but chose not to record the canons themselves, claiming they were well known and could be found in any local church. He almost certainly also wished to avoid suggesting that the early kingdom was anything less than the heroic enterprise his own generation preferred to remember.
The survival of the canons themselves is itself a remarkable story. Only a single copy appears to have survived the Muslim reconquest of the kingdom, preserved in a church in Sidon. That copy eventually found its way to Europe and was in the papal library at Avignon by 1330. It is now held in the Vatican Library under the shelfmark MS Vat. Lat. 1345. In the 18th century, Giovanni Domenico Mansi published a copy in his monumental collection Sacrorum Conciliorum nova et amplissima collectio. A more recent critical edition was produced by the scholar Benjamin Z. Kedar in the journal Speculum in 1999.
Kedar's analysis found that the canons were largely derived from the Byzantine Ekloge ton nomon, a legal code promulgated by Emperors Leo III and Constantine V in 741. This dependence on Byzantine legal tradition speaks to the complex cultural inheritance of the crusader states, which drew on Roman, Byzantine, and Latin ecclesiastical frameworks simultaneously. The question of whether these canons were actually enforced in the 12th century remains debated: Kedar believes they were, while Marwan Nader has argued against this view, pointing out that they do not appear in the later Assizes of Jerusalem compiled in the 13th century.
What is not in doubt is that the Council of Nablus represented a foundational moment in the constitutional and legal history of the crusader Kingdom of Jerusalem, a meeting at which the competing authorities of king and church defined their relationship and attempted, however imperfectly, to establish order in a kingdom perpetually on the edge of crisis.
