Pennsylvania's historical markers, on the maps of their own eras

Every mapped marker in the Pennsylvania Historical and Museum Commission's program now has a permanent page at TreeAlive, placing its full inscription on georeferenced maps from the period it commemorates.

2,545marker pages live

82,000+historical map sheets

PHMCcredited on every page

Every dot is a live page. Click one to open it.

Featured markers

Gettysburg Address

1863

See it on a period map →

George Washington

1753

See it on a period map →

York Liberty Bell

See it on a period map →

Washington Mill

1774–1795

See it on a period map →

What a Pennsylvania family sees

TreeAlive maps family trees. When a visitor's ancestors lived in Pennsylvania, the markers standing near those places surface automatically alongside their family's journey:

Lancaster County Courthouse · under a mile from where their sixth-great-grandfather lived in 1756 · commemorates 1739, while the family was in the area

A marker stops being a roadside plaque and becomes a destination with a personal reason to visit. Open the live demo tree, choose the Crossings tab, and turn on Historical Markers to see it working.

QR-ready, from day one

Every marker page has print-ready QR artwork. A scan at the sign opens the marker's page on the period map, no app to install. The artwork files are available to the commission and its sign vendors; TreeAlive does no printing or installation.

Marker page links are permanent: identifiers are never reassigned, so a code printed today resolves for good.

QR code opening the Gettysburg Address marker page

Scan: Gettysburg Address marker

Built for the America250 moment

The commission's 2026 Marker Trails tell Pennsylvania's founding stories quarter by quarter. Each trail can live as a set of linked marker pages on maps of the Revolutionary era, the same maps our visitors already explore through their own family history.