louvre, louver, luffer.
1. Outlet for smoke in a roof.

2. Lantern or femerell over such an outlet with openings at its sides.

3. Structure on a roof for ventilation fitted with horizontal fixed lever-, louvre-, or luffer-boards sloping downwards and outwards, each board lapping over the one below, with a space between to exclude rain but allow the passage of air.

4. Any opening fitted with sloping boards or louvres, especially the belfry-stage of a church-tower.

Louvre France's national museum and art gallery in Paris. It holds a collection of more than 100,000 works, including paintings, drawings, prints, and sculpture from all over the world, from the prehistoric period to the late 19th century. Originally a royal palace, the Louvre became a fully fledged museum in the 18th century and opened as the first national public gallery during the Revolution in 1793.

http://www.louvre.fr

Louvre the principal museum and art gallery of France, in Paris, housed in the former royal palace built by Francis I and later extended. ( Philip Augustus had first established a royal residence here in the late 12th century.) The royal collections, from Francis I onwards and greatly increased by Louis XIV, formed the nucleus of the national collection.