Liberty Tower, ca. 1980.

Rising 33 stories on a site only sixty-eight feet by eighty-two feet, Liberty Tower was a prominent feature of the early twentieth- century skyline. Its white terra-cotta cladding and steeply pitched copper roof evoke late English Gothic architecture. So slender a tower required elaborate wind bracing in its steel frame, and its foundations were also unusual, as caissons had to be sunk through quicksand to bedrock at a depth of 95 feet. In 1980, Liberty Tower became a pioneering example of the adaptive re-use of early office buildings when it was converted into condominiums.