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As the most important city in colonial America, Philadelphia has a rich history. The declaration of Independence was signed in the city's state house, now the Independence Hall. Other significant events like the signing of the US Constitution and the creation of a national flag also took place in Philadelphia.
Many buildings from this revolutionary period can be visited; most of them are clustered in the Independence National Historical Park.
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In 1987 this modern skyscraper was the first to eclipse the city hall in height. The following years several more tall skyscrapers would rise above the top of the city hall.
This group of neo-classical buildings housed the first American municipal water treatment system, built to supply Philadelphia with clean drinking water.
The PSFS building represents a milestone in American architecture. Constructed between 1930 and 1932, this 36 story skyscraper was the first to be built in the nascent International Style.
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