 The Chicago-style, glass-and-concrete skyscraper incorporated into its design several historic 19th-century buildings that lined Walnut Street.These buildings included three Federal-style rowhouses built in 1807 called York Row and the Italianate-style former headquarters of the Philadelphia Savings Fund Society, built in 1868–1869.After lying vacant and neglected for years, the only part of York Row preserved were the rowhouses' facades.