Old Main and Chemistry Building
 Old Main and Chemistry Building are two connected historic buildings located on the campus of Widener University at Chester Delaware County Pennsylvania. Old Main was built in 1867 and is a four-story stucco and stone building with a two-pitched roof. It has a central grand pediment with two minor flanking pediments. Atop the grand pediment is a dome structure and atop both minor pediments is a cupola. It measures 243 feet long and between 55 and 65 feet deep.