Philadelphia was the seat of the federal government almost continuously from 1776 to 1800; there the Declaration of Independence was signed in 1776 and the U.S. Constitution drawn up in 1787. Valley Forge, of Revolutionary War fame, and Gettysburg, site of the pivotal battle of the Civil War, are both in Pennsylvania. The Liberty Bell is located in a glass pavilion across from Independence Hall in Philadelphia.
Pennsylvania's nickname "The Keystone State" is quite apt, as the state forms a geographic bridge both between the Northeastern states and the Southern states, and between the Atlantic seaboard and the Midwest. It is bordered on the north and northeast by New York, on the east, across the Delaware River by New Jersey, on the south by Delaware, Maryland, and West Virginia, on the west by Ohio, and on the northwest by Lake Erie.
Pennsylvania's 1999 total gross state product was $383 billion, placing it 6th in the nation and its 2000 Per Capita Personal Income was $29,539, 18th in the nation. Its agricultural outputs are dairy products, poultry, cattle, nursery stock, mushrooms, hogs, and hay. Its industrial outputs are food processing, chemical products, machinery, electric equipment, and tourism.
Among the chief attractions are the Gettysburg National Military Park, Valley Forge National Historical Park, Independence National Historical Park in Philadelphia, the Pennsylvania Dutch region, the Eisenhower farm near Gettysburg, and the Delaware Water Gap National Recreation Area.