Formed in 1857 as the Saconna Iron Company, this steel works along the Lehigh River was reorganized the following year as the Bethlehem Rolling Mill and Iron Company. Under the direction of Robert H. Sayre, the Bethleham works grew over the next five years to include a blast furnace plant, puddling mills, and rolling mills. John Fritz supervised the design and construction of these structures.
Ref. HAER