Obelisk in Central Park (Courtesy Thom Watson/Flickr)

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Ruination. Mayor Bloomberg received an angry letter in the mail last week from Zahi Hawass, the secretary general of Egypt’s Supreme Council of Antiquities. According to the NY Times, Hawass is threatening to take back the circa-1500 B.C. monument if the city doesn’t properly care for the inscribed hieroglyphics. Heavily eroded, the obelisk was a gifted to the United States in 1869 to celebrate the completion of the Suez Canal.

Much, much more after the jump!