Volume 4 of the Mennonite Encyclopedia, containing entries O-Z.

This gigantic resource covers the 435-year history of the faith, life, and culture of Anabaptists in Europe and Mennonites throughout the world. Presented are people, movements, and places in their relation to Mennonites. A few of the many articles covered are Argentina, Arminianism, Baptism, Baptist, Brazil, Calvin, Church, Communion, Congo, Deaconess, Education, Farming, Furniture, Grebel, Hubmaier, Hymnology, Industry, Literature, Marriage, Publishers, Reedley, Ukraine, and Zurich.

The Mennonite Encyclopedia was jointly edited by historians and scholars of the Mennonite Church, General Conference of Mennonites, and Mennonite Brethren Church. More than 2,700 writers contributed articles to this reference work. Volume V includes updates on materials in the first four volumes plus nearly 1,000 new articles edited by Cornelius J. Dyck and Dennis D. Martin.