During the many decades that have passed since the establishment of the Brandywine Iron Works & Nail Factory — the business that evolved into the Lukens Steel Company, and is today ArcelorMittal — numerous historical milestones of the American iron and steel industry have been reached and recorded. Indeed, the plant's long history not only parallels that of the nation, but reflects the ambitions, struggles and accomplishments of successive generations in the continuing growth and development of the United States.;xNLx;;xNLx;The history of this business is largely based in one small Pennsylvania valley. However, its success has given that valley fame beyond its bounds and made it synonymous with American industrial progress.
Joseph Pennock builds the Pennock family home.
Peter Fleming builds Brandywine Mansion on land the family owns along the Brandywine River.
Son of Joseph Pennock and Sarah Pennock is born in New Garden Township, Chester County, Pennsylvania.
Moses Coates purchases Brandywine Mansion from Peter Fleming.
Moses Coates adds a larger addition to the Western side of Brandywine Mansion.
Isaac Pennock establishes the Federal Slitting Mill (later known as Rokeby) in West Marlborough Township, four miles south of present day Coatesville.
Rebecca Web Pennock, daughter of Isaac & Martha Pennock, is born in West Marlborough Township, Chester County, Pennsylvania.
