Philadelphia , Pennsylvania Consolidated city - county City of Philadelphia Clockwise from top : Philadelphia skyline ( 2015 ) ; City Hall ; Elfreth 's Alley ; paifang in Chinatown ; Ben Franklin Bridge ; SS United States at Port of Philadelphia ; College Hall at Penn ; Museum of Art ; Liberty Bell and Independence Hall Flag Seal Etymology : Ancient Greek : φίλος phílos ( beloved , dear ) and ἀδελφός adelphós ( brother , brotherly ) Nickname ( s ) : `` Philly '' , `` City of Brotherly Love '' , `` The Athens of America '' more ... Motto ( s ) : `` Philadelphia maneto '' ( `` Let brotherly love endure '' or `` ... continue '' ) Location of Philadelphia in Philadelphia County , Pennsylvania . Philadelphia Location in the United States Philadelphia Philadelphia ( the US ) Show map of Pennsylvania Show map of the US Show all Coordinates : 40 ° 00 ′ 34 '' N 75 ° 08 ′ 00 '' W ﻿ / ﻿ 40.009376 ° N 75.133346 ° W ﻿ / 40.009376 ; - 75.133346 Coordinates : 40 ° 00 ′ 34 '' N 75 ° 08 ′ 00 '' W ﻿ / ﻿ 40.009376 ° N 75.133346 ° W ﻿ / 40.009376 ; - 75.133346 Country United States Commonwealth Pennsylvania County Philadelphia Historic countries Kingdom of England Kingdom of Great Britain Historic colony Province of Pennsylvania Founded October 27 , 1682 Incorporated October 25 , 1701 Founded by William Penn Government Type Mayor -- Council Body Philadelphia City Council Mayor Jim Kenney ( D ) Area Consolidated city - county 142.71 sq mi ( 369.62 km ) Land 134.18 sq mi ( 347.52 km ) Water 8.53 sq mi ( 22.09 km ) Elevation 39 ft ( 12 m ) Population ( 2016 ) Consolidated city - county 1,567,872 Estimate ( 2016 ) 1,567,872 Rank US : 6th Density 11,685.02 / sq mi ( 4,511.61 / km ) Metro 6,069,875 ( US : 7th ) CSA 7,183,479 ( US : 8th ) Demonym Philadelphian Time zone EST ( UTC - 5 ) Summer ( DST ) EDT ( UTC - 4 ) ZIP code 19092 - 19093 , 19099 , 191xx Area code ( s ) 215 , 267 , 445 FIPS code 42 - 60000 GNIS feature ID 1215531 Website www.phila.gov

Question: philadelphia is known as the city of what
Answer: Brotherly Love