These societies developed and financed new industries, attracting skilled and knowledgeable immigrants from Europe. The city remained the young nation's largest until the late 18th century, being both a financial and a cultural center for America.Philadelphia's importance and central location in the colonies made it a natural center for America's revolutionaries. In 1816, the city's free black community founded the African Methodist Episcopal Church (AME), the first independent black denomination in the country, and the first black Episcopal Church.Benjamin Franklin, a leading citizen, helped improve city services and founded new ones, such as fire protection, a library, and one of the American colonies' first hospitals.
The Swedes responded by building Fort Nya Korsholm, or New Korsholm, after a town in Finland with a Swedish majority.
In 1655, a Dutch military campaign led by New Netherland Director-General Peter Stuyvesant took control of the Swedish colony, ending its claim to independence.
Philadelphia played an instrumental role in the American Revolution as a meeting place for the Founding Fathers of the United States, who signed the Declaration of Independence in 1776 at the Second Continental Congress, and the Constitution at the Philadelphia Convention of 1787. In the 19th century, Philadelphia became a major industrial center and a railroad hub.
Several other key events occurred in Philadelphia during the Revolutionary War including the First Continental Congress, the preservation of the Liberty Bell, the Battle of Germantown, and the Siege of Fort Mifflin. The city grew from an influx of European immigrants, most of whom came from Ireland, Italy and Germany—the three largest reported ancestry groups in the city as of 2015 The city's population doubled from one million to two million people between 18.
The Swedish and Finnish settlers continued to have their own militia, religion, and court, and to enjoy substantial autonomy under the Dutch.
The English conquered the New Netherland colony in 1664, though the situation did not change substantially until 1682 when the area was included in William Penn's charter for Pennsylvania.In 1644, New Sweden supported the Susquehannocks in their military defeat of the English colony of Maryland.In 1648, the Dutch built Fort Beversreede on the west bank of the Delaware, south of the Schuylkill near the present-day Eastwick neighborhood, to reassert their dominion over the area.Major corporations in the 19th and early 20th centuries included the Baldwin Locomotive Works, William Cramp & Sons Shipbuilding Company, and the Pennsylvania Railroad. Immigrants, mostly from Ireland and Germany, settled in Philadelphia and the surrounding districts.These immigrants were largely responsible for the first general strike in North America in 1835, in which workers in the city won the ten-hour workday.The Dutch considered the entire Delaware River valley to be part of their New Netherland colony.