the territory of the principality by purchasing the Lordship of Bouillon. He remained faithful to emperor Henry IV, who died as his guest. Henry of Namur (1119–21) was venerated as a martyr. During the administration of Alexander of Juliers (1128–34) the pope, the emperor and St Bernard of Clairvaux visited Liège. The episcopate of Raoul of Zachringen was marked by the preaching of the reformer Lambert le Bègue, who is credited with founding the Béguines. Albert of Louvain was elected Bishop of Liège in 1191, but Emperor Henry VI, on the pretext that the election was doubtful, gave the see to Lothair of Hochstadt. Albero's election was confirmed by the pope but in 1192, shortly after he took office, he was assassinated by three German knights at Reims. It is probable that the emperor was privy to this murder but Albero was canonized. In 1195, Albert de Cuyck (1195–1200) formally recognized the political franchise of the people of Liège. During the 12th century, the cathedral chapter, along with the bishop, assumed a more important role in the history of the principality. The struggles between the upper and lower classes, in which the prince-bishops frequently intervened, developed through the 13th and 14th centuries, and culminate in the 15th century in the pillage and destruction of the episcopal city. In the reign of Robert of Thourotte (1240–46), Saint Juliana — a nun of Cornillon Abbey — was led by certain visions to the project of having a feast established in honour of the Blessed Sacrament. After much hesitation, the bishop approved of her idea but death prevented the institution of the feast. The completion of the work was left to a former prior of the Dominicans in Liège, Hugh of Saint-Cher, who returned to the city as papal legate. In 1252 Hugh made the feast of the Blessed Sacrament an obligation throughout his diocese. John of Troyes, who, after having been archdeacon at Liège, was elected pope as Urban IV, encouraged the observance of the feast of Corpus Christi in the whole Church. Another archdeacon of Liège became pope under the name Gregory X and deposed the unworthy Henry of Gueldres (1247–74). The Peace of Fexhe, signed in 1316 during the reign of Adolph II de la Marck (1313–44), regulated the relations between the prince-bishop and his subjects. Nevertheless, internal discord continued and the episcopate of Arnold of Horne (1378–89) was marked