Ordo Sanctae Trinitatis at Captivorum
- Home site of the Trinitarian Order founded by Saint John of Matha. In English, French, Italian and Spanish.
- http://www.trinitari.org/

Order of the Most Holy Trinity - US Province
- Celebrating their 800th Anniversary of founding, the order's charisma today remains much as it was. To aid and help the faithful who are under attack or duress, and redemptive charity.
- http://www.trinitarians.org/