
thumb|Trinity (Andrei Rublev)|Old Testament Trinity [[icon by Andrei Rublev, (Tretyakov Gallery, Moscow)]] The Trisagion (; 'Thrice Holy'), sometimes called by its incipit Agios O Theos, is a standard hymn of ancient origin of the Divine Liturgy in most of the Eastern Orthodox, Western Orthodox, Oriental Orthodox, and Eastern Catholic churches.
thumb|Trinity (Andrei Rublev)|Old Testament Trinity [[icon by Andrei Rublev, (Tretyakov Gallery, Moscow)]] The Trisagion (; 'Thrice Holy'), sometimes called by its incipit Agios O Theos, is a standard hymn of ancient origin of the Divine Liturgy in most of the Eastern Orthodox, Western Orthodox, Oriental Orthodox, and Eastern Catholic churches.
In churches which use the Byzantine Rite, the Trisagion is chanted immediately before the Prokeimenon and the Epistle reading. It is also included in a set of prayers named for it, called the Trisagion Prayers, which forms part of numerous services (the Hours, Vespers, Matins, and as part of the opening prayers for most services).
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).