Archabbot Boniface Wimmer Assumption Abbey Saint Procopius Abbey Newark Abbey Belmont Abbey Saint Leo Abbey Saint Anselm Abbey Saint John's Abbey Saint Benedict's Abbey Saint Vincent Archabbey

Founded 1855, the American-Cassinese Congregation is a Catholic association of Benedictine monasteries.

The Congregation includes 25 monasteries; 19 are autonomous monasteries and 6 are dependent priories. Our monasteries are located in 15 of the United States, Puerto Rico, Brazil, Canada, Colombia, Mexico and Taiwan.

Abbot Boniface Wimmer OSB, founder of Saint Vincent Archabbey in Latrobe, Pennsylvania, created the Congregation. Pope Pius IX erected it as a monastic congregation under the patronage of the Holy Guardian Angels.

Our monasteries follow the Rule written by Saint Benedict of Nursia (480-547).

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Upcoming Events

February 14-18, 2020

Annual Abbots’ Workshop at Prince of Peace Abbey, Oceanside, CA. For more information, email

June 16-19, 2020

Association of Benedictine Colleges and Universities at St. Martin’s Abbey & University, Lacey, MA

June 13-23, 2020

Juniorate Formation Program at Mary Help of Christians Abbey, Belmont, NC For more information, contact Fr. Elias Correa-Torres, O.S.B. ()

June 21-26, 2020

Benedictine Leadership Institute for lay administrators and educators in secondary schools at St. Anselm Abbey & College, Manchester, NH

June 28-July 3, 2020

Benedictine Vocation Directors' Convocation at St. Benedict's Abbey, Atchison, KS. For more information contact: Brother Leven Harton, O.S.B. ()

June 19-24, 2022

54th General Chapter at St. Benedict’s Abbey, Atchison, KS