Olivet Nazarene University (ONU) is a Christian liberal arts university located in the village of Bourbonnais, Illinois, United States. Named for Olivet, Illinois, ONU was originally established as a grammar school in east-central Illinois in 1907. It is affiliated with the Church of the Nazarene and is the annual site of the Church`s “Regional Celebrate Life” youth gathering for the Central USA Region. It is one of the largest members of the Council for Christian Colleges and Universities.