faith. To enshrine St. Lambert's relics, his successor, Hubertus (later to become St. Hubert), built a basilica near the bishop's residence which became the true nucleus of the city. A few centuries later, the city became the capital of a prince-bishopric, which lasted from 985 till 1794. The first prince-bishop, Notger, transformed the city into a major intellectual and ecclesiastical centre, which maintained its cultural importance during the Middle Ages. Pope Clement VI recruited several musicians from Liège to perform in the Papal court at Avignon, thereby sanctioning the practice of polyphony in the religious realm. The city was renowned for its many churches, the oldest of which, St Martin's, dates from 682. Although nominally part of the Holy Roman Empire, in practice it possessed a large degree of independence. Late Medieval and Early Modern Periods The strategic position of Liège has made it a frequent target of armies and insurgencies over the centuries. It was fortified early on with a castle on the steep hill that overlooks the city's western side. During this medieval period, three women from the Liège region made significant contributions to Christian spirituality: Elizabeth Spaakbeek, Christina the Astonishing, and Marie of Oignies. In 1345, the citizens of Liège rebelled against Prince-Bishop Engelbert III de la Marck, their ruler at the time, and defeated him in battle near the city. Shortly after, a unique political system formed in Liège, whereby the city's 32 guilds shared sole political control of the municipal government. Each person on the register of each guild was eligible to participate, and each guild's voice was equal, making it the most democratic system that the Low Countries had ever known. The system spread to Utrecht, and left a democratic spirit in Liège that survived the Middle Ages. At the end of the Liège Wars, a rebellion took place against rule from Burgundy. In 1468 Duke Charles the Bold of Burgundy, witnessed by King Louis XI of France, captured and largely destroyed the city after a bitter siege which was ended with a successful surprise attack. The rebellion figures prominently in the plot of Sir Walter Scott's 1823 novel Quentin Durward. The Prince-Bishopric of Liège was technically part of the Holy Roman Empire which, after 1477, came under the rule of the Habsburgs. The reign of prince-bishop Érard de La Marck (1506–1538) coincides with the dawn of the Renaissance. During the Counter-Reformation, the diocese