[1] The original concrete building was designed by Emery Roth & Sons and Pietro Belluschi, a leader of the Modern Movement in architecture.

[3] Against the backdrop of a nationwide economic downturn and the collapse of Baltimore's traditional harbor industries, the assessed values of downtown properties declined significantly by 1977, including 100 East Pratt, which was then leased by IBM.

[9] The building contains more than 600,000 square feet (56,000 m2) of office, retail, and conference space, as well as a fitness center on its twelfth floor.

Current office space tenants include financial services firms such as T. Rowe Price, Merrill Lynch, and PricewaterhouseCoopers.

Tenants occupying street-level retail space include Starbucks, Brio Tuscan Grille, and JoS.