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Philadelphia City Hall is the seat of government for the city of Philadelphia, Pennsylvania. At 167 m (548 ft), including the statue, it is the world's second-tallest masonry building, only 1.6 feet (0.49 m) shorter than Mole Antonelliana in Turin. The weight of the building is borne by granite and brick walls up to 22 feet (6.7 m) thick, rather than steel; the principal exterior materials are limestone, granite, and marble.
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