Features

World Trade Square aka Renaissance Plaza. Credit: Alesker & Dundon Architects

Visualizing World Trade Square, an Unbuilt Multi-Tower Complex in Northern Liberties, North Philadelphia

8:00 am on February 28, 2021 By Thomas Koloski

Yesterday Philly YIMBY published a feature story covering the 1,050-foot-tall Philadelphia World Trade Center supertall planned at 456 North Christopher Columbus Boulevard on the Delaware River waterfront in Northern Liberties in 1988. After the proposal fell through, developer Carl Marks Real Estate Group contracted Alesker & Dundon Architects to redesign the project as four shorter yet still impressive skyscrapers, which were to take up most of the 5.5-acre site. The development would now be known as World Trade Square, and later as Renaissance Plaza.

Philadelphia World Trade Center looking northeast. Model by Thomas Koloski

Revisiting the Unbuilt Philadelphia World Trade Center Supertall Proposal

8:00 am on February 27, 2021 By Thomas Koloski

In 1988, plans were revealed for a 1,050-foot-tall, 65-story Philadelphia World Trade Center supertall at 456 North Christopher Columbus Boulevard on the Northern Liberties waterfront. The tower would have stood just to the north of the Benjamin Franklin Bridge, located close to the boundary between North Philadelphia and Center City. The plan, which later evolved to the World Trade Square project, consisted of three shorter high-rises alongside the main tower. The skyscraper was designed by Kling Lindquist, which was also bend the Bell Atlantic Tower and the unbuilt Center City Tower. Carl Marks Real Estate Team, along with Lance Silver and Stuart Harting, were the developers.

Twin Independence Blue Cross Towers. Image from WZMH Architects

Examining the Once-Proposed Twin Independence Blue Cross Towers

8:00 am on February 26, 2021 By Thomas Koloski

Ever since the 500-foot-plus height limit was erased after One Liberty Place went up, developers rushed to construct buildings taller than the prior boundary. Designed by WZMH Architects, the twin towers of the Independence Blue Cross Tower were originally proposed to stand next to each other, rising 625 feet and 45 stories tall at 1901 Market Street and at 1919 Market Street in 1901 Market Street and at Center City West. The group behind the design is the same as the one that designed the CN Tower in Toronto, Canada. The developer of the twin tower project is The Linpro Company, which has only erected one tower that stands out on the skyline.

Bridgeman's View Tower. Rendering via Studio Agoos Lovera

Looking Back at Bridgeman’s View Tower, an Unbuilt 915-Foot-Tall Skyscraper Once Proposed in Northern Liberties, North Philadelphia

7:30 am on February 25, 2021 By Thomas Koloski

Over the course of the past three decades, many high-rise projects have been proposed along the Delaware River, yet most bit the dust before construction had ever begun. One of these is the 915-foot-tall, 66-story Bridgeman’s View Tower planned in 2007 at 900 North Delaware Avenue in Northern Liberties, North Philadelphia, a surprising location for such a tall skyscraper proposal, given the area’s then-lowrise profile. Designed by Studio Agoos Lovera and developed by Marc Stien, Ryan Roberts, and an undisclosed North Jersey real estate investment team, the tower was planned to feature a mix of residential office, hotel, and retail space, with 794 condominiums and 200 to 300 boutique hotel rooms.

Philly YIMBY Reveals Massing Models for the Schuylkill Yards Supertall in University City, West Philadelphia

8:00 am on February 16, 2021 By Thomas Koloski

Ever since the master plan for Schuylkill Yards in University City was unveiled for the first time, it displayed a supertall skyscraper dominating the 14-acre site, a feature that persisted throughout all future iterations. Renderings show a glass-clad tower rising at 3101 Market Street, accented with bronze highlights that appear similar to those at 9 DeKalb and 111 West 57th Street in New York City, which are also designed by SHoP Architects, the group behind the Schuylkill Yards master plan. Brandywine Realty Trust, the project developer, is also responsible for projects such as the 350-foot-tall tower proposed at 2100 Market Street in Center City. As of the 2016 renderings, the supertall appears to rise around 1,100 feet high.

Mellon Bank Center. Photo via Elizabeth Day Art & Architectural Illustration

A Look at the Former, Taller Iteration of Mellon Bank Center, Center City

8:00 am on February 12, 2021 By Thomas Koloski

The 824-foot Mellon Bank Center at 1735 Market Street was completed in 1990. Originally, the tower had a similar design yet with a taller shape and several other differences. Designed by Kohn Pedersen Fox and developed by CommonWealth REIT, the tower would have stood 880 feet tall and would have featured projecting floor space at the corners up to an estimated height of 400 feet. The crown would have also appeared more skeletal than it looks today. Stone patterns all around the base are different.

American Commerce Center rendering via Kohn Pendersen Fox

The Story of the American Commerce Center, Once Planned as Philadelphia’s Tallest Tower

8:00 am on February 10, 2021 By Thomas Koloski

During the construction of the first Comcast Center tower, many wondered whether the 975-foot-tall skyscraper would rank as the city’s tallest for much longer. Just a few months before the former’s topping out, details were released about the American Commerce Center at 1800 Arch Street, a proposal that stunned many development watchers with its 1,510-foot height. The project was being developed by Hill International Real Estate Partners and designed by Kohn Pendersen Fox, a firm that is also behind the 792-foot-tall Mellon Bank Center, currently the city’s fifth-tallest building, and Arthaus, a 542-foot-tall skyscraper currently under construction. The development was ultimately canceled and the 1,121-foot-tall Comcast Technology Center was built at the site.

Philadelphia skyline from South Street Bridge. Photo by The Philadelphia Inquirer

The Illustrated History of Philadelphia’s Skyscraper Boom of 1984-1991

8:00 am on January 28, 2021 By Thomas Koloski

The Philadelphia skyline is anchored by a group of particularly tall buildings, but just 40 years ago, not a single tower rose over 548 feet, the height of the City Hall tower that was completed in 1901. An informal “gentlemen’s agreement” held towers back from rising above the limit, but no developer was successful until One Commerce Square was approved in 1984, which was soon followed by a series of even taller skyscrapers. Philly YIMBY looks at the history behind these Center City buildings, which shaped a major portion of the Philadelphia skyline as we know it today.

One Liberty Place from Cira Green. Photo by Thomas Koloski

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

8:00 am on January 18, 2021 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.

How One Liberty Place Revolutionized the Philadelphia Skyline

8:00 am on January 5, 2021 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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