 But with the proposals by the major business, commercial and industrial interests of the area with the release of the Charles Center project proposal by the recently organized Greater Baltimore Committee and the local Chamber of Commerce with the leadership of several mayoral administrations in 1958 continuing into the early 1970s, followed by a parallel soon-to-be nationally famous "Inner Harbor" redevelopment around the old waterfront piers, wharves, warehouses, offices and businesses of the former "Basin" along the Baltimore Harbor at the Northwest Branch of the Patapsco River continued another major building boom from the early 1960s to the early 1990s, during which the City saw the completion of 18 of its 24 tallest buildings, including the 1973 United States Fidelity and Guarantee Company's new headquarters (later the Legg Mason Building, now the Transamerica Tower) at the corner of the harbor at Pratt and Light Streets and the five-sides/pentagonal high-rise centerpiece of the harbor, the Baltimore World Trade Center for the Maryland Port Administration in 1977.The City is the site of two completed buildings that are at least high, with one more under construction and two proposed for construction.As of June 2008, there are 163 completed high-rises in the city.