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Located on the Inner Harbor of Baltimore, Maryland, the Baltimore World Trade Center is the world's tallest equilateral five-sided building (the five-sided JPMorgan Chase Tower in Houston, Texas is taller, but has unequal sides). It was designed by the firm of the famous architect I.M. Pei, with the principal architects being Henry Cobb and Pershing Wong. The building was completed in 1977 at a cost of $22 million.
The John Hancock Tower officially named, Hancock Place and colloquially known as The Hancock, is a 60-story, 790-foot (241 m) skyscraper in Boston. The tower, the tallest in the city, was designed by Henry N. Cobb of the firm now known as Pei Cobb Freed & Partners and was completed in 1976. In 1977, the American Institute of Architects presented the firm with a National Honor Award for the building.