|State motto||Virtue, liberty, and independence (Adapted in 1875, and it represents the fact that Philadelphia was the site where the Declaration of Independence was signed.)|
|State bird||Ruffed grouse|
|State flower||Mountain Laurel|
|State insect||Photuris pennsylvanica (Pennsylvania Firefly)|
|State animal||White-tailed deer|
|State dog||Great Dane|
|State fish||Brook Trout|
|State fossil||the trilobite Phacops rana|
|Union admission rank||2nd|
|State song||"Pennsylvania" (formerly "Hail, Pennsylvania!" until 1990)|
|State ship||United States Brig Niagara|
|State electric locomotive||Pennsylvania Railroad GG1 #4849 Locomotive|
|State steam locomotive||Pennsylvania Railroad K4s Locomotive|
|State beautification plant||Crown vetch|
Pennsylvania has been known as the Keystone State since 1802, based in part upon its central location among the original Thirteen Colonies forming the United States, and also in part because of the number of important American documents signed in the state (such as the Declaration of Independence). It was also a keystone state economically, having both the industry common to the North (making such wares asConestoga wagons and rifles) and the agriculture common to the South (producing feed, fiber, food, and tobacco).
Another one of Pennsylvania's nicknames is the Quaker State; in colonial times, it was known officially as the Quaker Province, in recognition of Quaker William Penn's First Frame of Government constitution for Pennsylvania that guaranteed liberty of conscience. He knew of the hostility Quakers faced when they opposed religious ritual, taking oaths, violence, war and military service, and what they viewed as ostentatious frippery.
"The Coal State", "The Oil State", "The Chocolate State", and "The Steel State" were adopted when those were the state's greatest industries.
"The State of Independence" currently appears on many road signs entering the state.