Preaching, Recruitment and Communication in the Crusading Movement

From Pope Urban II’s call at Clermont in 1095, popes and their representatives relied on clergy, envoys, letters, public preaching and local networks to recruit participants and raise money. Those methods changed over time: early appeals often travelled through word of mouth and personal connections, while the papacy developed more systematic preaching arrangements in the thirteenth century.

The process reached beyond expeditions to the eastern Mediterranean. Appeals also supported campaigns in Iberia and the Baltic, and crusading could be promoted by unauthorized popular preachers as well as by papal officials. Letters carried the papal appeal outward; local preaching and public vows turned it into recruitment and financial support.

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From Clermont to local recruitment

At the Council of Clermont in November 1095, Urban II called for armed aid to eastern Christians and a campaign directed toward the East. The council itself dealt with church reform and other matters; the appeal became its best-known outcome. Urban’s speech was not preserved as a transcript. Accounts written afterward differ in emphasis, with some stressing assistance to eastern Christians and others giving greater prominence to Jerusalem. Fulcher of Chartres, who attended the council, is an important witness, but his account was written from memory several years later.

Urban’s own letter of December 1095 provides a separate record of the appeal. Addressed to Christians in Flanders, it called on princes to aid the churches of the East and named Adhemar, bishop of Le Puy, to lead the expedition. Urban set the departure for 15 August 1096. The call also spread through people who had attended Clermont and then carried news home. Accounts describe its rapid circulation in parts of France, but the message did not reach every region equally or at once. Urban held further councils and encouraged church leaders to publicize the expedition.

The first response was not confined to established rulers and trained warriors. Peter the Hermit preached to crowds in areas Urban had not visited, and other preachers gathered groups in German lands. Peter was said to carry a heavenly letter urging the recovery of the Holy Land. These loosely organized forces left before the main noble-led armies and lacked reliable provisions and discipline. Their actions, including attacks on local communities and Jewish people, were not the result of a papal instruction to commit such violence. They show how an appeal could acquire momentum beyond the control of the authorities who had issued it.

Sermons, audiences and the taking of the cross

Preaching was the principal way to turn a papal call into recruitment and fundraising. Clergy at different levels could preach, from parish priests to senior churchmen, although the extent of local participation varied. Sermons were delivered not only in churches but also in marketplaces, noble courts and at tournaments. Feast days associated with the cross were especially favoured occasions. Preachers could ask local priests to gather parishioners, bringing an appeal to people who might never attend a major church council or court.

A sermon often led to a public act known as taking the cross. The recruit made a commitment to the expedition and wore a cross sewn onto clothing, making the vow visible to others. The cross became a recognizable sign of crusading participation. Its meaning was not only military: the appeal presented the journey as a devotional and penitential undertaking as well as an armed campaign. Crusade sermons accordingly addressed not just potential fighters but also people who might provide financial support instead.

Recruitment therefore depended on more than enthusiasm. A noble’s expedition could require years of income, and participants might rely on loans, gifts or the backing of relatives and supporters. The papacy also developed ways to solicit money from people who did not travel. In 1215, for example, the Fourth Lateran Council established a clerical levy for the Fifth Crusade, and crusade privileges were extended to those who funded a warrior’s journey when they could not go themselves. These arrangements connected preaching to the practical costs of assembling and supplying an expedition.

Messages, envoys and the Second and Third Crusades

News from the eastern Mediterranean could create a new campaign as well as a sermon could. After Edessa fell in 1144, Bishop Hugh of Jabala and Armenian clergy brought news to Pope Eugenius III. Eugenius issued the bull Quantum praedecessores in December 1145, calling for a new expedition and setting out privileges for those who took the cross. The message was then carried to audiences by Bernard of Clairvaux, whom the pope commissioned to preach.

Bernard preached at Vézelay in 1146 and travelled through France and Germany. His preaching helped secure support among nobles, while at Speyer he persuaded Conrad III of Germany to take the cross. The campaign also showed the risks of preaching that escaped authorized control. The Cistercian Radulf promoted the crusade without permission and incited attacks on Jewish communities in the Rhineland. Bernard intervened against him, and local church leaders also opposed the violence. The episode demonstrates that a message could be taken up in ways its sponsors neither intended nor accepted.

After the defeat at Hattin and the loss of Jerusalem in 1187, Pope Gregory VIII issued the bull Audita tremendi. Joscius of Tyre was appointed to preach in France, and Henry of Albano in Germany. At Gisors in 1188, the appeal helped bring the English and French kings together as participants, while Conon of Béthune, a French-language poet and songwriter, also spread the message. Frederick I of the Holy Roman Empire took an oath at the Curia Christi, or Court of Christ, in Mainz. Fundraising accompanied recruitment: England and France imposed the Saladin tithe, a levy of ten per cent on income and movable goods.

Written appeals and envoys could also recruit troops without a general preaching campaign. In preparation for a planned expedition in 1129, Baldwin II of Jerusalem sent envoys to Europe to raise military support. Royal envoys negotiated support directly with potential patrons and recruits.

Appeals beyond the eastern Mediterranean

From the beginning, the geography of crusading appeals was wider than the Holy Land. Urban II urged Catalan counts to fight the Almoravids in Iberia and offered them spiritual rewards equivalent to those associated with the eastern campaign. In 1147, Pope Eugenius III also named Iberia as a crusading theatre. These appeals connected regional military needs with a broader papal framework, while leaving recruitment dependent on local rulers, clergy and circumstances.

The Baltic campaign against the Wends illustrates how preaching could be adapted when potential recruits had other priorities. Saxon lords resisted abandoning their conflict with the pagan Wends to join the expedition to the East. Eugenius III responded with the bull Divina dispensatione in 1147, extending crusading privileges to the Wendish campaign. Bernard of Clairvaux did not preach that crusade, but he wrote in its support. A decree required his letter to be widely proclaimed and read aloud, turning a written message into a public act of preaching.

Building a more organized preaching system

As crusading campaigns recurred, the papacy sought greater oversight of recruitment. For the Fourth Crusade, Pope Innocent III appointed senior clergy in each French ecclesiastical province to preach, assisted by members of the Templar and Hospitaller orders. He used a similar arrangement in France and northern Italy for the Fifth Crusade. In 1213, he organized preaching into zones and assigned a procurator to each, an official responsible for coordinating the campaign. The arrangement did not apply everywhere, but it marked a move from relying chiefly on the existing church hierarchy toward planned, delegated recruitment.

These systems connected public appeals to administrative and financial work. For the Fourth Crusade, Innocent III commissioned Fulk of Neuilly to preach in France and imposed a levy on clerical income. The campaign’s leaders also had to secure transport: they contracted with Venice to provide a fleet, but far fewer crusaders assembled there than expected. Some went by other routes and others did not fulfil their vows. The leaders had concealed their plan to attack Egypt from ordinary participants, fearing opposition. When the expedition was later diverted to Zara, some crusaders objected and left. Recruitment and communication could thus shape a campaign’s course, but they could not prevent disagreement or defection.

By the mid-thirteenth century, Dominican and Franciscan friars had taken on much of the responsibility for preaching crusades. Written aids appeared as the system developed, including collections of model sermons and illustrative stories. In the 1260s the Dominican Humbert of Romans wrote a handbook for crusade preachers. Such tools could help make appeals more consistent, while local preachers still had to address particular audiences and circumstances.

Responses, failures and competing appeals

Preaching did not produce a single kind of response. In 1212, popular movements in central Europe and the Rhineland arose amid processions and preaching connected to aid for Iberian Christians and opposition to the Cathars. Later accounts describe children and young people seeking to reach Jerusalem, but none reached the Holy Land, and the sources mix events with legend. In 1251, following Louis IX’s defeat in Egypt the previous year, a preacher known as the Master of Hungary claimed to carry a letter from the Virgin Mary and gathered followers in northern France and Flanders. This movement, later called the Shepherds’ Crusade, attacked Jewish communities before royal forces dispersed it. Both movements recruited outside the papacy’s authorised preaching structure.

The messages also had consequences for people who were not being recruited. The attacks on Jewish communities in 1096 and during the Second Crusade show that crusading enthusiasm could be redirected toward vulnerable neighbours. Bishops and other church authorities sometimes tried to protect those communities, but their efforts did not always stop the violence. Preaching could mobilize support, but its reception depended on local conditions and could exceed the preacher’s or pope’s control.

Muslim communities also used preaching to communicate calls for resistance. Friday sermons were one setting for appeals against the crusaders. According to the Damascene chronicler Ibn al-Qalanisi, Muslims from Aleppo interrupted a preacher in Baghdad in 1110, destroyed the pulpit and called for aid to Syria. They repeated the appeal at the caliph’s mosque the following week, after which Sultan Muhammad Tapar agreed to launch an attack. The episode shows that public religious speech could carry news of military danger and press political leaders to respond.

Across these campaigns, recruitment depended on a chain of communication: a decision by a pope or ruler, messengers and documents that carried it outward, preachers who addressed local audiences, and ceremonies that turned listeners into vowed participants. That chain could raise armies and money across great distances, but its reach was uneven. Local priorities, unauthorized movements, incomplete information and military reversals all affected what a crusading appeal ultimately set in motion.