 140 New Montgomery

140 New Montgomery Street, originally known as The Pacific Telephone & Telegraph Company Building, and, after 1984, as The Pacific Bell Building or The PacBell Building, in San Francisco's South of Market district, is an Art Deco mixed-use office tower located close to the St. Regis Museum Tower and the San Francisco Museum of Modern Art.The 26-floor building was designed to consolidate numerous smaller buildings and outdated offices into a modern headquarters for The Pacific Telephone & Telegraph Co., and as a result, was designated as the Pacific Telephone & Telegraph Co. Coast Division Offices by the company, though referred to colloquially as "The Telephone Building".