How long did it take to build the Louvre museum?

The Louvre Museum did not have to be built to display the artwork collected by the French because it was already completed. The Louvre was originally built in the 12th century as a royal castle to help defend Paris against attacks. It went through many changes until it was finally opened as a museum of art in 1793 shortly after the end of the French Revolution. The complex of buildings was turned over entirely to art and culture in 1882, when the Palace of the French monarchy was demolished. It has taken about 700 years from its start as a castle to the museum it is today.