A passing lane (North American English) or overtaking lane (British, Irish and Australian English) is the lane on a multi-lane highway or motorway closest to the center of the road (the central reservation). In some countries, lanes are described as being on the 'inside' or the 'outside' of a road - which one the passing lane is varies.
When Italian handyman Vincenzo Peruggia stole the Mona Lisa from the Louvre in 1911, he never could have guessed her absence would be the very thing that made her the most recognizable painting on the planet.
As the Mona Lisa is not up for sale, it is impossible to know its monetary worth. It has not been sold since it was purchased for 4,000 ecus by King Francis I of France in around 1516. It was worth about 700 million USD in 2009.