http://graphics8.nytimes.com/video/players/offsite/index.html?videoId=100000004451691 PARIS — The square at the center of the Louvre, dominated by I.M. Pei’s glass pyramid, was desolate early Friday morning, save for a few tourists taking selfies. The museum was closed to visitors, as Paris experienced its worst flooding since 1982 — but inside, staff members and volunteers had worked around the clock to remove artworks from the threat of the rising waters of the Seine River. I was part of a small group of journalists whom the French culture minister, Audrey Azoulay; the museum’s president, Jean-Luc Martinez; and other officials took on a tour of the strangely vacant museum on Friday afternoon. (Broadcast journalists were given priority;…