53 Pa. Stat. § 3186
The taking, using, and appropriating, by the right of eminent domain as herein provided, of private property for the purpose of making, enlarging, extending, and maintaining public parks, parkways, and playgrounds, and of neighboring property, within two hundred feet of the boundary lines of such public parks, parkways, and playgrounds, in order to protect such public parks, parkways, and playgrounds, their environs, the preservation of the view, appearance, light, air, health, and usefulness thereof, by reselling such neighboring property, with such restrictions in the deeds of resale as will protect said property, so taken for the aforesaid purpose, is hereby declared to be taking, using, and appropriating of such private property for public use: Provided, however, That the proceeds arising from the resale of any such property, so taken, shall be deposited in the treasury of said cities, and be subject to general appropriation by the councils of said city.
53 P.S. § 3186