The Construction of Notre Dame de ParisIn 1160, because the church in Paris had become the "parish church of the kings of Europe", Bishop Maurice de Sully deemed the current Parisian cathedral unworthy of its lofty role, and had it demolished shortly after he assumed the title of Bishop of Paris. According to legend, de Sully had a vision of a glorious new cathedral for Paris, and sketched it in the dirt outside of the original church. To begin the construction, the bishop had several houses demolished and had a new road built in order to transport materials for the rest of the cathedral.
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Construction began in 1163, during the reign of Louis VII, and opinion differs as to whether Maurice de Sully or Pope Alexander III laid the foundation stone of the cathedral. However, both were at the ceremony in question. Bishop de Sully went on to devote most of his life and wealth to the cathedral's construction. Construction of the west front, with its distinctive two towers, began circa 1200, before the nave had been completed, contrary to normal construction practice. Over the construction period, numerous architects worked on the site, as is evidenced by the differing styles at different heights of the west front and towers. Between 1210 and 1220, the fourth architect oversaw the construction of the level with the rose window and the great halls beneath the towers. The towers were completed around 1245, and the cathedral was completed around 1345.
The Organ of Notre Dame de ParisThough several organs were installed in the cathedral over time, the earliest ones were inadequate for the building. The first noteworthy organ was finished in the 1700s by the noted builder François-Henri Clicquot. Some of Clicquot's original pipework in the pedal division continues to sound from the organ today. The organ was almost completely rebuilt and expanded in the 19th century by Aristide Cavaillé-Coll.
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The position of titular organist at Notre-Dame is considered as one of the most prestigious organist posts in France, along with the post of Saint Sulpice in Paris, Cavaillé-Coll's largest instrument. The organ has 7,800 pipes, with 900 classified as historical. The organ has 109 stops, five 56-key manuals and a 32-key pedalboard. In December 1992, work was completed on the organ that fully computerized the organ under 3 LANs (Local Area Networks).
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Among the best-known organists at Notre Dame was Louis Vierne, who held this position from 1900 to 1937. Under his tenure, the Cavaillé-Coll organ was modified in its tonal character, notably in 1902 and 1932. Pierre Cochereau initiated further alterations (many of which were already planned by Louis Vierne), including the electrification of the action between 1959 and 1963 (the original Cavaillé-Coll console, which is now located in the south tower entrance to the tribune), was replaced by a new console in Anglo-American style) and the addition of further stops between 1965 and 1972, notably in the pedal division, the recomposition of the mixture stops, and finally the adding of three horizontal reed stops "en chamade". After Cochereau's sudden death in 1984, four new titular organists were appointed at Notre Dame in 1985: Jean-Pierre Leguay, Olivier Latry, Yves Devernay (who died in 1990), and Philippe Lefebvre. This was reminiscent of the 18th-century practice of the cathedral having four titular organists, each one playing for three months of the year. Beginning in 1989, another restoration to the instrument was undertaken, which was completed in 1992.