[Paris ]. A corruption of Lupara, as it is called in old title-deeds. Dagobert is said to have built here a hunting-seat, the nucleus of the present magnificent pile of buildings.
“He'll make your Paris Louvre shake for it.”
Shakespeare: Henry V, ii. 4.
Louvre. The tower or turret of a building like a belfry, originally designed for a sort of chimney to let out the smoke. (French, l'ouvert, the opening.)
Louvre boards in churches. Before chimneys were used, holes were left in the roof, called loovers or leuver holes. From the French l'ouvert (the open boards).
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894