O Nata Lux, Light Born of Light (5-926)
O Night Divine (3-625)
O No, John (0-413)
O Praise the Name of Christ, the Lord (1-670)
O Rest in the Lord (1-849)
O Rest in the Lord (2-322)
O Sacred Feast (5-565)
O Sacred Head, Now Wounded (5-966)
O sacrum convivium (5-461)
O sacrum convivium (6-030)
O Saviour, Prescious Saviour (6-155)
O Send Thy Light Forth (1-794)
O Shining Star (5-861)
O Sing to the Lord (3-629)
O Sinner Man (0-499)
O Sons and Daughters, Let Us Sing (1-793)
O Swallow, Swallow (4-519)
O Trinity, Most Blessed Light (0-420)
O Turn Away Mine Eyes (5-041)
O vos omnes (0-428)
O vos omnes (2-169)
O vos omnes (3-239)
O Waly, Waly (0-422)
O Western Wind (5-048)
