The city's Landmarks Preservation Commission approved a 600-building extension of the Park Slope Historic District.
In now includes a total of 2,575 structures, which makes it larger than historical districts in Greenwich Village and on the Upper West Side.
The expanded district is made up of mostly tree-lined streets filled with brownstones. It also includes the former Ansonia Clock Works factory, once the world's largest clock manufacturer. It connects to the existing historic area - 30 blocks of townhouses near the western side of Prospect Park.
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