Revolutionary War Gun Factory. During the British occupation of Philadelphia, Pennsylvania's provisional government moved west and its official gun factory was established at Hummelstown. Secretly operating near here from 1777 to 1779, it mass-produced muskets and rifles for the Continental Army.

226 W Main St., Hummelstown, PA, United States

Hummelstown Brownstone Quarries. High quality brownstone was quarried near here, 1863-1929, and sold across the nation as a preferred masonry material of builders. The Hummelstown Brownstone Company, founded by Allen Walton, employed immigrant skilled stone-cutters and laborers in its quarries.

104 E Main St., Hummelstown, PA, United States