The Old Schwamb Mill in Arlington, Massachusetts, is located on the oldest continuously operating mill site in the United States. The Schwamb Mill Preservation Trust Inc. exists for the preservation, maintenance, and enhancement of the Old Schwamb Mill. Established in 1864 as a picture frame manufactory, the Mill is located on the site of many previous mills built on Mill Brook. It is the rare survivor of the small, family-owned mills that helped define New England. The Mill’s unique 19th-century elliptical faceplate lathes, its original shaft-and-pulley machinery, and the original hand-turning process are used to this day to create custom-made oval and circular frames. The Trust preserves and protects the Mill’s site, buildings, tools, archives, machinery, and manufacturing techniques as unique cultural and educational resources.