Catoctin Furnace Fireback

Located in Frederick County, Maryland, Catoctin Furnace was built in 1775-1776 by Thomas Johnson, the first governor of Maryland.

From about 1801 to 1812 the furnace was leased to the partners Benjamin Blackford and Thomas Thornburgh. The Maryland partnership of Blackford and Thornburgh was apparently highly successful with the younger Blackford as manager.

Today Catoctin Furnace is part of Cunningham Falls State Park and a recently restored historic site.