The Eiffel Tower is constructed entirely from metal, and during the summer heat, can sway up to 7 inches. Speaking of heat, the painters of The Eiffel Tower are rarely out of work. It requires repainting every few years, and the paint on the landmark alone weighs that of 10 elephants.
The Louvre museum is the world's most popular museum, welcoming around 9 millions visitors every year. Its popularity is partly due to its eclecticism and its great variety of pieces of art. The museum lists a total of 460,000 pieces, but "only" 35,000 are shown to the public. It is the biggest collection on the planet. If you wanted to see every artwork, for just 30 seconds each, it would take you 35 days.
In 1911, the Mona Lisa was stolen by Italian thief Vincenzo Peruggia, making it the greatest art theft of the 20th century. Peruggia, a former employee of the The Louvre, dressed in an employee uniform and simply took it off the wall when nobody was watching. He was caught two years later, when he tried to sell it to an art dealer in his native Italy. He served just over a year in prison before going on to live a relatively crime-free life.