 They were built around the same time (Chase Tower opened in 1971, the year before One Financial Plaza opened), and Chase Tower is only a few floors taller, at 31 stories.When the building was constructed in 1972, it was known as the Landmark Bank Building, after its builder and main tenant, Landmark Bank.Landmark Bank was acquired by C&S in 1985 and, after a series of mergers and acquisitions, became a part of Bank of America.