List of Pennsylvania state historical markers

The PHC was empowered to mark by proper monuments, tablets, or markers, places or buildings within the Commonwealth where historical events transpired.

[3] The earliest markers were bronze plaques often mounted on large stones gathered from the Pennsylvania countryside.

Philadelphia architect Paul Philippe Cret designed later bronze plaques that included the state's coat of arms with text laid out within a rectangular double border.

Starting in 1945, markers were cast of aluminum, used gold-colored text of raised characters on a deep blue background within a silver-colored frame, and were initially affixed to concrete posts, so as to be more easily seen by motorists alongside roads.

These counts are based on entries in the Pennsylvania Historical and Museum Commission's database as of August, 2020.