The "Merci" message -- French for "thank you" -- was printed with a Facebook-style thumbs-up outside Paris City Hall Wednesday after the city's official page surpassed 2 million "likes," the first time a city has reached the milestone, Radio France Internationale reported Thursday.
Officials said only about 335,000 of the Facebook fans are from France.
Paris is the most-visited city in the world, counting 29 million tourists in 2011.
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