Miami University (informally Miami of Ohio or simply Miami) is a public research university in Oxford, Ohio. The university was founded in 1809, although classes were not held until 1824. Miami University is the second-oldest university in Ohio and the 10th oldest public university (32nd overall) in the United States. The school's system comprises the main campus in Oxford, as well as regional campuses in nearby Hamilton, Middletown, and West Chester. Miami also maintains an international boarding campus, the Dolibois European Center in Differdange, Luxembourg. The Carnegie Foundation classifies Miami University as a research university with a high research activity. It is affiliated with the University System of Ohio.