The Old Schwamb Mill in Arlington, Massachusetts is located on the oldest continuously operating mill site in the United States. Mills have been located on the main building site since the late 1600s.

In 1864, Charles Schwamb purchased a rebuilt, two-and-a-half story wood frame industrial building that had been built three years earlier but never occupied. The Schwambs proceeded to build west and east wing additions in 1869 and the early 1880s, respectively and were still making picture frames on the premises as late as 1969. After 105 years operating as a family-owned business, a remarkable transition from working factory to a living history museum was made possible by the vision and determination of Arlington resident and early preservationist Patricia Cunningham Fitzmaurice.

The Mill’s unique 19th-century elliptical lathes, its original belt-driven shaft-and-pulley machinery, and the original hand-turning process are used to this day to create custom-made oval and circular frames for customers around the world.

In 1971, the Old Schwamb Mill was listed on the National Register of Historic Places.