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In page Bowling Green (New York City):

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The fence surrounding Bowling Green Park was erected in 1773 to protect the equestrian statue of King George III.[1] It still stands as the oldest fence in New York City.[1][2] The fence was originally designed by Richard Sharpe, Peter T. Curtenius, Gilbert Forbes, and Andrew Lyall, and was erected at a cost of 843 New York pounds (£562 sterling). It was made of wrought iron upon a stone base. Each fence post contained finials at its top, which in turn were once adorned with lamps.[3]