Unbuilt

City Tower model and schematics. Images via Louis I. Kahn

A Look at the Unbuilt City Tower by Louis Kahn in Center City

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

In the 1950s, Philadelphia was starting to see a rise in new development as developers focused on Center City, particularly after the demolition of the “Chinese Wall” opened up a large swath of space from City Hall to the Schuylkill River. A wild proposal called the City Tower was revealed in the late 1950s at 1400 Arch Street, where the Philadelphia Municipal Services Building currently stands. The 30-story tower would have stood just to the north of City Hall. The tower was designed by Louis I. Kahn in a dramatic Futurist style, as the building’s design and form were way ahead of its time.

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.

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.

Mandeville Place rendering. Image via Richard Meier and Partners Architects

Revisiting Mandeville Place, a 607-Foot-Tall High-Rise Once Proposed at 2401 Walnut Street in Center City West

7:30 am on March 8, 2021 By Thomas Koloski

Philly YIMBY’s “unbuilt” series continues with Mandeville Place, a slender, 607-foot-tall high-rise proposed at 2401 Walnut Street in Center City West in the mid-2000s. Designed by Richard Meier & Partners Architects and developed by Bedrock Group LLC, the 43-story skyscraper would have joined an existing eight-story building to the south, which would have been converted into hotel space. A shared amenity rooftop was planned between the two structures. The tower would have featured 45 condominium units that would have offered dramatic views of the skyline.

Waldorf Astoria looking northwest. Image via Cope-Linder Architects

Looking at the Waldorf Astoria Hotel & Residences Once Proposed at 1441 Chestnut Street in Center City

8:00 am on March 3, 2021 By Thomas Koloski

Today’s entry in Philly YIMBY’s ongoing “unbuilt” series is the Waldorf Astoria Hotel & Residences Philadelphia, proposed at 1441 Chestnut Street in Center City, where the W/Element Hotel is now nearing completion. The 567-foot-tall, 59-story tower would have occupied the south side of the site of the former One Meridian Plaza, a 492-foot-tall office skyscraper damaged by a lethal fire in 1991 and demolished in 1999 (yesterday YIMBY covered a supertall structure proposed earlier at the site). Like the W/Element Hotel, the Waldorf Astoria iteration was also designed by Cope-Linder Architects, though the developers at the time were Mariner Commercial Properties, Inc. and Gatehouse Capital Corporation. The tower would have featured 181 hotel rooms and 126 residences.

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.

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.

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