Nidaros ordo

Sunday 30 August. Thirteenth Sunday after Trinity. Commemoration of Ss Felix and Adauctus, martyrs. Anthem after Compline: Ave regina celorum.
Monday 31. Feria II. Sub tuum presidium.
Tuesday 1 September. Saint Egidius, abbot, single. Commemoration of St Priscus, martyr. O florens rosa.
Wednesday 2. Feria IV. Rogamus te.
Thursday 3. Feria V. Ave stella matutina.
Friday 4. Translation of St Cuthbert, bishop and confessor, three lessons. Mundi domina.
Saturday 5. St Bertinus, abbot, three lessons. Salve regina.

Nidaros ordo

Sunday 23 August. Twelfth Sunday after Trinity. Anthem after Compline: Ave regina celorum.
Monday 24. SAINT BARTHOLOMEW, apostle, double. Sub tuum presidium.
Tuesday 25. St Audoen, bishop and confessor, three lessons. O florens rosa.
Wednesday 26. Feria IV. Rogamus te.
Thursday 27. St Hermes, martyr, three lessons. Ave stella matutina.
Friday 28. St Augustine, bishop and confessor, semidouble. Mundi domina.
Saturday 29. Beheading of John the Baptist, nine lessons. Commemoration of St Sabina, widow. Salve regina.

Audoen is Ouen, bishop of Rouen, and not the first saint from what is now Normandy that we've come across in the Nidaros calendar. Evidence perhaps that the liturgical reforms of William of Volpiano lie somewhere in the substrata of the Nidaros use.

St Hermes was an early Roman martyr (like Sabina). His feast was traditionally observed on the 28th. The thirteenth-century Ordo Nidrosiensis Ecclesie gives rather vague instructions about how to negotiate the clash of this feast with that of St Augustine of Hippo. By the time of the printed Breviary of 1519, the pragmatic decision had obviously been taken to transfer Hermes permanently to the 27th.

Ave Maria, by Franz Biebl

Nidaros ordo

Sunday 16 August. Eleventh Sunday after Trinity. Commemorations of the Octaves of St Laurence and of the Assumption. Anthem after Compline: Ave regina celorum.
Monday 17. Octave day of St Laurence, three lessons. Com. Oct. Ass. Sub tuum presidium.
Tuesday 18. Feria III in Oct. Ass. O florens rosa.
Wednesday 19. Feria IV in Oct. Ass. Rogamus te.
Thursday 20. Feria V in Oct. Ass. Ave stella matutina.
Friday 21. Feria VI in Oct. Ass. Mundi domina.
Saturday 22. Octave day of St Mary, semidouble. Com. Ss. Thimoteus and Simphorian. Salve regina.

Nidaros ordo

Sunday 9 August. Tenth Sunday after Trinity. Commemoration of the Octave of the Translation of St Olaf, king and martyr. Anthem after Compline: Ave regina celorum.
Monday 10. ST LAURENCE, martyr, double. Com. Oct. Transl. Olaf. Sub tuum presidium.
Tuesday 11. St Tiburcius, martyr, three lessons. Com. Oct. Laur. O florens rosa.
Wednesday 12. Feria IV in Oct. Laur. Rogamus te.
Thursday 13. St Ypolitus and his companions, martyrs, three lessons. Com. Oct. Laur. Ave stella matutina.
Friday 14. VIGIL OF THE ASSUMPTION. Comm. St Eusebius, bishop and confessor, and Oct. Laur. Alma redemptoris.
Saturday 15. THE ASSUMPTION OF ST MARY THE VIRGIN, summum. Com. Oct. Laur. Salve regina.

Nidaros ordo

Sunday 2 August. Ninth Sunday after Trinity. Commemorations of Saint Stephen, pope and martyr, and of the Octave of the Natale of St Olaf, king and martyr. Anthem after Compline: Alma redemptoris.
Monday 3. TRANSLATION OF ST OLAF, summum. Comm. of the Invention of St Stephen, protomartyr, and of Oct. Nat. Olaf. Sub tuum presidium.
Tuesday 4. Feria III in Oct. Nat. Olaf. Com. Transl. Olaf. O florens rosa.
Wednesday 5. Octave day of the Natale of St Olaf, semidouble. Comm. Transl. Olaf, and St Oswald, martyr. Rogamus te.
Thursday 6. Transfiguration of the Lord, nine lessons. Comm. Transl. Olaf, and St Sixtus, pope. Ave stella matutina.
Friday 7. St Donatus, bishop and martyr, three lessons. Mundi domina.
Saturday 8. Vigil of St Laurence, martyr. Com. St Ciriacus and companions, martyrs. Salve regina.