Definition: The term Philadelphia is a city in Pennsylvania, United States. It's one of the 80 cities in the United States where English is spoken as a first language. The name "Philadelphi" means "City of Brotherly Love". This name is derived from the name of John the Baptist, who had been arrested by Herod Antipas during his exile to Rome and was brought to Philadelphia for trial. After being found guilty, he was beheaded in Philadelphia. This city has a strong connection with the Roman Catholic faith and its historical roots are rich.