The East Ridge Historical Area of UMass Amherst consists of several of the older lecture halls on campus, primarily those used by the entomology, plant pathology and other natural science programs. These buildings were originally located adjacent to the campus orchard where the Central Residential Area currently stands today. The district consists mainly of lecture halls that were built prior to the First World War by the Massachusetts Agricultural College; however, it is also home to the Boltwood-Stockbridge House, the oldest house in Amherst.