Final answer:
Philadelphia is the largest city in Pennsylvania, the second most populous on the East Coast, and the fifth largest in the U.S., known as the city of Brotherly Love. It played a significant role in early American history and the abolition movement.
Step-by-step explanation:
The largest city in Pennsylvania, the second most populous city on the East Coast, and the fifth largest city in the United States is Philadelphia. Known as the city of Brotherly Love, Philadelphia boasts a rich history and is renowned for its significant role in early American history. The city was a key player in the Atlantic trade, including the slave trade, which some of the local Quaker population actively sought to abolish due to a contradiction with their beliefs.
Downtown Philadelphia's city hall exemplifies the urban characteristics of the megalopolis that extends from Boston to Washington, D.C. As a crucial port city, Philadelphia attracted many immigrants and grew rapidly because of its diversified contacts and trade within the Atlantic world, contributing to its reputation as an ideal destination for those seeking betterment, including noted figures like Benjamin Franklin.