Directory
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- Our Lady of Fatima Monastery of the Vietnamese Cistercians Switzerland Priory Cisterciens
- Our Lady of Peace Abbey Castagniers · Alpes-Maritimes · Provence-Alpes-Côte d'Azur Nuns Cisterciens
- Our Lady of Peace Abbey - Chimay Chimay · Hainaut Nuns Trappistes
- Ourscamp Abbey Chiry-Ourscamp · Oise · Hauts-de-France Brothers
- Our Lady of Kokoubou Monastery (Benin) Parakou · Benin Monks Trappistes
- Our Lady of the Mount of Olives Priory Martinique Bénédictins
- Oasis of St. Benedict and St. Scholastica Philippines House Bénédictins
- Abtei Oberschönenfeld Gessertshausen · Germany Abbey Cisterciens
- Oita Japan Simple priory Monks Trappistes
- Olivetan Benedictine Sisters Priory Bénédictins
- Olivetan Benedictine Sisters of Busan Busan · South Korea Priory Sisters Bénédictins
- Onze Lieve Vrouwe Abdij Netherlands Abbey
- Oosterhout Netherlands Abbey Canons regular Prémontrés
- Opactwo Benedyktynek Poland Abbey Bénédictins
- Opactwo Benedyktynek Poland Abbey Bénédictins
- Opactwo Benedyktynow Krakow · Poland Abbey Monks Bénédictins
- Opactwo Mniszek Benedyktynek p/w Trojcy Przenajswi Poland Abbey Bénédictins
- Opactwo OO. Cystersów Poland Abbey Cisterciens
- Opactwo OO. Cystersów Poland Abbey Cisterciens
- Opactwo OO. Cystersów Poland Abbey Cisterciens