The story of Pennsylvania's history would not be complete without looking at the things that played a key role. Some are incredible innovations such as the Conestoga wagon or radios in Pennsylvania that changed the way people lived.  Others are broader concepts like child labor and agriculture.  Then there are those iconic things that people envision when they think Pennsylvania, like the liberty bell or our state symbols.  Below you'll find these and many other things that are important in the story of Pennsylvania history.