53 Pa. Stat. § 14102
Cities of the first class may purchase, acquire through condemnation proceedings, enter upon, take, use, possess, improve, and appropriate all such lands, either for temporary or permanent use, as may be necessary in connection with the holding of any public exposition celebrating any sesqui-centennial in such city, including grounds for the site of such exposition and all lands necessary for the opening, laying out, widening, or altering of streets, avenues, or boulevards as approaches thereto, and for that purpose the councils of such cities may enact ordinances, rules, and regulations appropriate and necessary for the purchase, condemnation, taking over, entry, possession, use, improvement, regulation, management, and control of the same without any other or further acts or proceedings now required by law, and may incur indebtedness and make such appropriation as may be required for the payment of any property acquired or used under authority of this act.
53 P.S. § 14102