Philadelphia City Hall was the largest masonry load-bearing wall building in the world at the time of its completion in 1901, stood as the tallest occupied building in the United States until 1909, and still is the largest city hall in the United States. The building covers 14.26 acres, originally contained 634 rooms with over 1 million square feet of space, and with its tower and statue of William Penn rises a total of 548 feet above the ground. The construction of Philadelphia City Hall began in 1872 and was completed in 1901.
Society: ASCEMain Category: CivilSub Category: BuildingsEra: 1900-1909DateCreated: 19011 Penn SquarePhiladelphiaState: PAZip: 19107Country: USAWebsite: http://www.asce.org/Project/Philadelphia-City-Hall/Creator: McArthur, John , Walter, Thomas
YearAdded:Image Credit: Courtesy Flickr/elPadawan (CC BY-SA 2.0)Era_date_from: 1901
Society: ASCEMain Category: CivilSub Category: Boundaries & SurveysEra: 1750-1799DateCreated: 1767Delaware PennsylvaniaCountry: USAWebsite: http://www.asce.org/Project/Mason-Dixon-Line/Creator: Mason, Charles , Dixon, Jeremiah
The granite milestones marking the Mason-Dixon Line bear crests from the two parties involved in the land-grant dispute, the families of William Penn and Charles Calvert (also known as Lord Baltimore).
YearAdded:Image Credit: Original Image: Flickr/Padraic (CC BY-SA 2.0)Era_date_from: 1767