The Keystone Country Pennsylvania'southward essential role in the founding of the The states earned it the nickname, the "Keystone Country." The term "keystone" comes from compages and refers to the key, wedge-shaped stone in an curvation, which holds all the other stones in place. During the early on days of our nation, Pennsylvania held a primal position geographically, economically, and politically. Today the keystone is a popular symbol of Pennsylvania — information technology'south fifty-fifty used every bit an official symbol of Pennsylvania country government. Each Pennsylvania state bureau has its own variation of the keystone every bit its logo.