Trans National Place, also referred to as 115 Winthrop Square, was a visionary proposal for a supertall skyscraper located in the heart of Boston, Massachusetts, United States.

Originally conceptualized by renowned architect Renzo Piano, in collaboration with the Boston-based firm Childs Bertman Tseckares Inc., the project aimed to redefine Boston's skyline.

[2] The skyscraper was envisioned to be the tallest building in Boston, projected to exceed the height of the iconic John Hancock Tower by 15 stories and destined to reach at least 210 feet (64 meters).

The primary factors contributing to this decision included a downturn in the commercial real estate market and considerable objections from the Federal Aviation Administration, which raised concerns over the building's proposed height being a hazard for air traffic near Logan International Airport.

Yet, as regulatory hurdles and market fluctuations intervened, the promise of this iconic skyscraper remained unfulfilled, leaving an indelible mark on Boston’s architectural narrative.