The Grande Bibliothèque du Québec is a very large library in downtownMontreal, Quebec, Canada. It houses the Bibliothèque nationale du Québec, Quebec's national library, as well as a large part of the collection of Montreal's public library system.

The GBQ's collection consists of some 4 000 000 works, including 1 140 000 books, 1 200 000 other documents, and 1 660 000 microfiches. Of these, 45% are from the Bibliothèque nationale du Québec, 33% are the former collection of the Bibliothèque centrale de Montréal (in the Montreal public library system), 20% are new acquisitions, and 2% are from other libraries.

These works are divided into two collections: the Collection nationale or Quebec heritage collection, dedicated to conserving documentation from or about Quebec, and available for on-site reference; and the Collection universelle, a vast selection of works on all subjects, including both circulating and reference works. Besides written works, there is also a large collection of audio recordings, sheet music, and videos.

The GBQ, which had been a pet project of former Quebec premier Lucien Bouchard, was designed by Patkau Architects from Vancouver, British Columbia and Croft-Pelletier/Gilles Guité from Quebec City.

Construction on the new 33,000 m² library, a M$90.6 project, began in 2001 on the site of the former Palais de la commerce. It was opened 30 April 2005 in time for the World Book and Copyright Day, during a year in which Montreal held the honorary title of World Book Capital.

The postmodern five-story building is clad with U-shaped plates of glass of a type never used before in North America, placed horizontally on the copper uprights that run the whole height of the building.

The national and universal collections are each housed in one of two chambres de bois ("wooden rooms"), a reference to Anne Hébert's novel Les Chambres de bois. These multi-story areas are demarcated by walls of wooden slats, either allowing indirect natural light or blocking it according to the conservation needs of the collection.

In addition to its collections, reading rooms, and audiovisual facilities, the library also contains exhibition spaces and auditoria. The basement contains a children's library with special audiovisual equipment, the Espace jeunes.

In accordance with the Quebec government's policy on integrating art and architecture, the building contains several integrated works of art:

• an exterior sculpture, Espace fractal, by Jean-Pierre Morin;
• a glass mural on the rue Savoie façade, Vous êtes ici, by Dominique Blain;
• a kinetic luminous mural at metro level, Voix sans bruit, by Louise Viger;
• a sculpture garden to the north of the building, divided into plots of which one will be developed with sculpture and landscape art each year; currently containing Jardin punk and Jardin de la forêt urbaine by Roger Gaudreau.

The GBQ is located at 475, boul. De Maisonneuve at the corner of rue Berri, in the heart of University of Quebec campus. It is directly connected by the underground city to Berri-UQAM metro station.

• Official Website (French, with English summary)