Philadelphia County, Pennsylvania was established on March 10, 1682 and given a Latin name by William Penn, which means “brotherly love!” Its county seat is Philadelphia, and its fair is also held in Philadelphia! You might recognize the Liberty Bell, Independence Hall, Reading Terminal Market, Franklin Institute, Thaddeus Kosciuszko National Memorial, and of course, the stairs where Rocky Balboa completed his training montage in , which are located in this county!