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 consists of 19 independent monasteries with houses or dependencies in 15 of the United States, Puerto Rico, and in six other countries on three continents.

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).

Please email us at webmaster@amcass.org about the website with any questions, comments, suggestions, or edits.



Upcoming Events

July 5-10, 2019

North American Association of Benedictine Oblates. Biennial meeting at Christ the King Priory, Schuyler, NE

July 22-26, 2019

Benedictine Development Symposium at Christ the King Priory, Schuyler, NE

September 30-October 4, 2019

BENet 2019: Triennial symposium sponsored by the International Commission on Benedictine Education in Sydney, Australia

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, 21-26, 2020

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

June 19-24, 2022

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