Controversy that brought excommunication upon the Salian Emperor Henry IV. The king's personal power, through an effective and loyal chancery, penetrated to the local level to an extent unmatched in France. The king's administration and law unified the realm, rendering him relatively impervious to papal condemnation. In 1097 he commenced the original Westminster Hall, built "to impress his subjects with the power and majesty of his authority". Religion Less than two years after becoming king, William II lost his father's adviser and confidant, the Italian-Norman Lanfranc, Archbishop of Canterbury. After Lanfranc's death in 1089, the king delayed appointing a new archbishop for many years, appropriating ecclesiastical revenues in the interim. In panic, owing to serious illness in 1093, William nominated as archbishop another Norman-Italian, Anselm – considered the greatest theologian of his generation – but this led to a long period of animosity between Church and State, Anselm being a stronger supporter of the Gregorian reforms in the Church than Lanfranc. William and Anselm disagreed on a range of ecclesiastical issues, in the course of which the king declared of Anselm that, "Yesterday I hated him with great hatred, today I hate him with yet greater hatred and he can be certain that tomorrow and thereafter I shall hate him continually with ever fiercer and more bitter hatred." The English clergy, beholden to the king for their preferments and livings, were unable to support Anselm publicly. In 1095 William called a council at Rockingham to bring Anselm to heel, but the archbishop remained firm. In October 1097, Anselm went into exile, taking his case to the Pope. The diplomatic and flexible Urban II, a new pope, was involved in a major conflict with Holy Roman Emperor Henry IV, who supported Antipope Clement III. Reluctant to make another enemy, Urban came to a concordat with William, whereby William recognised Urban as pope, and Urban gave sanction to the Anglo-Norman ecclesiastical status quo. Anselm remained in exile, and William was able to claim the revenues of the archbishop of Canterbury to the end of his reign. However, this conflict was symptomatic of medieval English politics, as exemplified by the murder of Thomas Becket during the reign of the later Plantagenet king Henry II (his great-nephew through his brother Henry) and Henry VIII's actions centuries later, and as such should not be seen as a defect of William's reign in particular. Of course,