First Iron Bridge. The first iron truss bridge in the U.S. was built in 1845 in the Philadelphia & Reading Railroad blacksmith shop, just south of here. It was designed for the railroad in 1844 by Richard B. Osborne.

SE corner, High & York Sts., Pottstown, PA, United States

Pottsgrove Manor. Built in 1752 by John Potts, Ironmaster & founder of Pottstown. The manor was located at the center of a 1,000 acre plantation that included the town, an iron forge, gristmills, and other businesses by 1762. The town was incorporated 1815 as the borough of Pottstown.

At site, 100 W. King St. , Pottstown, PA, United States