History

One Liberty Place from Cira Green. Photo by Thomas Koloski

Designing One Liberty Place, the Tower that Transformed Philadelphia’s Skyline

By Thomas Koloski

One Liberty Place at 1650 Market Street is an intricately designed skyscraper has dominated the skyline of Center City for over three decades. Designed by Murphy/Jahn and developed by Rouse and Associates, the tower is clad in a pattern of stone, metal, and glass that rises up to the angled crown and the thin spire. The tower first rose to its final 61-story height in the beginning of 1987, when the top floor was assembled beneath the future spire. Philly YIMBY looks back at the design process by architect Helmut Jahn via drawings from 1984, which show multiple design iterations.

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PECO Building with the new display. Photo by Thomas Koloski

Crown Lights Restored Atop the PECO Building at 2301 Market Street in Center City West

By Thomas Koloski

An upgrade has been completed for the lighting array atop the PECO Building at 2301 Market Street in Center City West. Designed by H2L2 (Harbeson, Hough, Livingston & Larson), the building was completed in 1970, which was soon followed by a number of major high-rise developments in Center City. The tower rises to a total of 27 stories and 384 feet, an an impressive height for its time. While the tower does not feature an outstanding design, it is widely known for its tenant, the PECO Energy Company, which serves customers across the tri-state area and all over the country. However, the tower is best known for its 38-foot-high screen spanning every face on top of the tower, measuring 148 feet across on the north and south façades and 71 feet across the east and west faces. Over the decades, more than 17,500 digital messages have scrolled across the display.

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How One Liberty Place Revolutionized the Philadelphia Skyline

By Thomas Koloski

In August 1987, the 945-foot-tall One Liberty Place officially opened at 1650 Market Street as Philadelphia’s tallest skyscraper, soaring above the long-held unofficial height limit of 548 feet, set by the tower of City Hall in 1901. This remarkable skyscraper with a fantastical design ultimately led to the city gaining a new cluster of tall and massive skyscrapers that define the skyline to this day. In this feature, Philadelphia YIMBY explores the building’s progress from concept to reality, as well as its tenure as the city’s tallest skyscraper for 31 years.

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