“The General Assembly of Pennsylvania authorized the official state flag in 1799.  The Pennsylvania flag features the state coat of arms embroidered on a field of blue fringed in gold.  The state motto is on a ribbon at the base of the design.”  http://www.statesymbolsusa.org/Pennsylvania/Flag.html

“Based on a 1778 design by Caleb Lownes of Philadelphia, the Pennsylvania coat of arms features a shield crested by an American bald eagle, flanked by horses, and adorned with symbols of Pennsylvania’s strengths – a ship carrying state commerce to all parts of the world; a clay-red plough (a symbol of  Pennsylvania’s rich natural resources); and three golden sheaves of wheat, representing fertile fields and Pennsylvania’s wealth of human thought and action. An olive branch and cornstalk cross limbs beneath – symbols of peace and prosperity.”  The state motto that appears below the coat of arms is:  “Virtue Liberty and Independence.”   http://www.statesymbolsusa.org/Pennsylvania/Coat_of_Arms.html