Supertall

A Look at the Lobby of the Comcast Technology Center, Philadelphia’s Tallest Building

7:00 am on December 22, 2021 By Thomas Koloski

The Comcast Technology Center at 1800 Arch Street in Center City is both the tallest building and one of the largest structures in Philadelphia, standing 1,121 feet tall and spanning over 1.5 million square feet of interior space. Completed in 2017, the supertall stands 60 stories high and features office space on its lower floors and a hotel on its upper levels, with an observation deck at the top. The project was developed by Liberty Property Trust and designed by Foster and Partners, with Thornton Tomasetti behind the structural design and LF Driscoll as the contractor. Gensler crafted the exquisite and sometimes bizarre interior of the main lobby, with an architectural style well-suited for the modern workforce and the general public alike. In this feature, Philadelphia YIMBY observes the east lobby of the Comcast Technology Center which is open to the employees and the public at limited times.

The Centennial Tower. Image from Clarke, Reeves and Company

Remembering the Unbuilt Centennial Tower in Fairmount Park, West Philadelphia

8:00 am on April 20, 2021 By Thomas Koloski

During the planning for the Centennial Exposition of 1876, expo organizers put forth a bold proposal for an incredibly tall structure called the Centennial Tower in Fairmount Park, where two buildings still remain from the expo. The tower was planned at 1,000 feet tall, well before any skyscrapers were built in the city. The tower would have risen as large cross-braced tube that slims down at the top, capped with a short cone top and lightning rod, and would have featured four observation levels. The metal structure was designed by Clarke, Reeves and Company, which had also designed an older bridge that stood at then site of the current Girard Avenue Bridge.

The Philadelphia skyline as seen from the Walt Whitman Bridge. Photo by Thomas Koloski

Looking at Some of the Most Impactful Additions to the Philadelphia Skyline Since 2017

8:00 am on April 6, 2021 By Colin LeStourgeon

The Philadelphia skyline has long provided an iconic image for the city and the state, with high-rise buildings dating back to the late 19th century, the most iconic being the City Hall, which topped out in 1894 as the tallest habitable building in the world, a title it held until 1908. Each era of skyscraper construction has made a significant impact on the skyline, with prominent types of skyscrapers defining each time period. The city has recently seen a skyscraper construction boom, which began around 2017, with many high-rises completed and under construction since that time. Philadelphia YIMBY looks at some of the most impactful structures that the city has received during this period.

Philadelphia skyline with unbuilt proposals. Image and models by Thomas Koloski

The Unbuilt Skyline: a Comprehensive Look at Philadelphia’s Major Canceled Skyscrapers

8:00 am on March 22, 2021 By Thomas Koloski

The Philadelphia skyline has grown enormously over the past few decades, yet there are many formerly planned towers that were once planned yet were never completed. Philly YIMBY recently ran a series of articles that shined a spotlight on a number of unbuilt buildings. The designs came in various unique shapes: some featured curves, some boxy, and others with sharp angled cuts that gave them distinct character. While some were notably more appealing than others, even the most subpar of these designs would have dramatically elevated the city’s already impressive skyline to a new level. Today we present what the skyline would have looked like if all of these developments were built.

Designing the Comcast Technology Center, The Tallest Skyscraper in Philadelphia

8:00 am on March 21, 2021 By Thomas Koloski

The Comcast Technology Center at 1800 Arch Street in Center City has stood as Philadelphia’s tallest skyscraper since 2017, with a height of 1,121 feet, and Philadelphia YIMBY takes a look at various concepts through schematics and models of the tower before the design was finalized.

Revisiting Visionary Plans for a 30th Street Station District Plan Supertall in University City, West Philadelphia

8:00 am on March 18, 2021 By Thomas Koloski

Several years ago, plans have been revealed for a major megadevelopment to be built on a new deck above the Amtrak railyard on the banks of the Schuylkill River in University City, West Philadelphia. The project is called the Philadelphia 30th Street Station District Plan, as the first phase includes restoration of the historic 30th Street Station. Designed by Skidmore, Owings, and Merrill and developed by Plenary Infrastructure Philadelphia, the master plan shows a large number of high-rises and a supertall skyscraper that would become the tallest, or one of the tallest, buildings in the city.

Center City Tower rendering with Liberty Place. Image via Kling Lindquist

A Look Back at Center City Tower, Once Planned as the City’s First Supertall Skyscraper

8:00 am on March 2, 2021 By Thomas Koloski

In the late 1990’s, a massive supertall was planned at the site of the 492-foot-tall One Meridian Plaza, an office skyscraper damaged by a fatal fire in 1991 and demolished in 1999. The proposed Center City Tower at 1414 South Penn Square in Center City would have been built where The Residences at The Ritz-Carlton and the under-construction W/Element Hotel currently stand. Designed by Kling Lindquist, the 1,050-foot tower would have become the first supertall skyscraper in Philadelphia, rather than the Comcast Technology Center, which took the title 20 years later. Notably, Comcast was also considering taking office space at Center City Tower, and the cable company’s decision to pull out of the project and to build Comcast Center at 17th and Arch Street instead was a major reason behind the supertall’s cancellation.

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.

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.

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