Question: The organ at Notre Dame de Paris has how many pipes?
About the article "Notre Dame de Paris", section "Organ".

Candidate passages:
Though 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 18th century 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.
The position of titular organist ("head" or "chief" organist) at Notre-Dame is considered one of the most prestigious organist posts in France, along with the post of titular organist of Saint Sulpice in Paris, Cavaillé-Coll's largest instrument.
The organ has 7,374 pipes, with ca 900 classified as historical.
It has 110 real stops, five 56-key manuals and a 32-key pedalboard.
In December 1992, a two-year restoration of the organ was completed that fully computerized the organ under three LANs (Local Area Networks).
The restoration also included a number of additions, notably two further horizontal reed stops "en chamade" in the Cavaille-Coll style.
The Notre-Dame organ is therefore unique in France in having five fully independent reed stops "en chamade".
With 8,000 pipes, the organ is reputed to be the largest pipe organ in France, surpassing the organs of Saint Sulpice and Notre Dame de Paris.
The organ originally constructed by P.-A.
Ducroquet was powerful enough for the premiere of Hector Berlioz' titanic "Te Deum" to be performed at St-Eustache in 1855.
It was later modified under the direction of Joseph Bonnet.
The present instrument was designed under the direction of Titular Organist Jean Guillou and dates from 1989 and was built by the Dutch firm of Van den Heuvel retaining a few ranks of pipes from the former organ.  
Bish has made over thirty recordings on many of the great organs of the world including the celebrated Müller organ of the Grote of St. Bavokerk in Haarlem, Netherlands, Canterbury Cathedral, and Notre Dame Cathedral in Paris.
She is the first American woman to record at the organ of Freiburg Cathedral in Freiburg, Germany.
Her recordings include music for organ and orchestra, brass and organ, cello and organ, most of the great organ masterpieces, original compositions and hymn arrangements.
List of recordings  "Artistry of Diane Bish" (1978)  "Christmas Festival" (1970)  "Favorites from Freiburg Cathedral"  "Glorious pipes" (1990)  "The Glory of the Organ" (1980)  "Great European Organs" (1990), featuring organs of Austria, France, Germany, and the Netherlands  "Hymns on Coral Ridge Organ"  "The Joy of Christmas" (1980), accompanying the Diane Bish Chorale at organ   "The Joy of Music presents Hymns and Classics" (1990)  "Morning Has Broken" (1989)  "Pipes and More Pipes" (1978), organ and bagpipes  "Praise to the Lord" (1985)  "The Passion Symphony" (1979)   "Sixty-six hundred voices of praises  
Native from Nancy, Johann Vexo studied organ with Christophe Mantoux, historical music with Martin Gester and harpsichord with Aline Zylberajch at the Conservatoire of Strasbourg, where he was awarded first organ prize.
After being admitted to the Conservatoire National Supérieur de Musique of Paris, he perfected his studies with Michel Bouvard and Olivier Latry, and won their first organ prize, their first basso continuo prize and the Diplôme de Formation Supérieure.
In parallel, he took writing classes, winning the harmony and counterpoint prizes.
In 2004, Johann Vexo was granted the position of organist for the Choir Organ of the Cathedral of Notre-Dame de Paris.
Since 2009, he is also organist of the Cathedral of Nancy.
He holds the Aptitude Certificate and teaches organ at the Conservatoire of Angers.
Johann Vexo teaches organ during the European Summer Masterclasses of Nancy, performs many concerts, both in France and abroad (Europe, North America, Russia) and has recorded several CDs on historical French organs, especially one for "JAV recordings" on the great organ of Notre-Dame de Paris. 
Notre-Dame-d'Auteuil is a church on the Auteuil hill in the 16e arrondissement de Paris.