555 California Street, formerly Bank of America Center, is a 52-story, 779 ft (237.4 m) skyscraper in San Francisco, California, and is also known locally as Triple Nickel. It is the second tallest building in the city and a focal point of the Financial District. Completed in 1969, the tower served as the World headquarters of Bank of America until the 1998 merger with NationsBank, when the company moved its headquarters to the Bank of America Corporate Center in Charlotte, North Carolina.
A 70 percent interest was acquired by Vornado Realty Trust from foreign investors in March 2007 with a 30 percent limited partnership interest still owned by Donald Trump, while continuing to be managed by the Shorenstein Company.
555 California Street was meant to be a deliberate and unambiguous display of the wealth, power, and importance of Bank of America. To that end, the center was handled by the architecture firms Wurster, Bernardi and Emmons and Skidmore, Owings and Merrill, with architect Pietro Belluschi consulting. The structural engineering was performed by the San Francisco firm H. J. Brunnier Associates. The skyscraper incorporates thousands of bay windows thanks to its unique design, meant to improve the rental value and to symbolize the bay windows common in San Francisco residential real estate. At the north foot of the skyscraper is a large plaza named in honor of Bank of America founder A.P. Giannini that is often shaded during the Day, leading to it being criticized as cold and windswept by many.