| ID | Title  | Author | Language | Number of records | Number of melodies |
|---|---|---|---|---|---|
| 517 | Nunc omnes iubilemus | Anonymous | Latin | 0 | 0 |
| 740 | Nunc omnes ornat chrisma quos | Anonymous | Latin | 0 | 0 |
| 586 | Nuž křesťané viery pravé Nuz krzestyane wyeri prawe | Jan Čapek | Czech | 0 | 1 |
| 95 | O clemens speciosa | Anonymous | Latin | 0 | 0 |
| 317 | O consolatrix pauperum | Anonymous | Latin | 2 | 1 |
| 270 | O crux Christi laudabilis | Anonymous | Latin | 0 | 0 |
| 158 | O David stirps | Anonymous | Latin | 1 | 0 |
| 332 | O de Iuda benedicte | Anonymous | Latin | 0 | 0 |
| 894 | O dia dei potentia O dia dei potencia | Anonymous | Latin | 0 | 0 |
| 835 | O felicem genitricem | Anonymous | Latin | 0 | 1 |
| 191 | O filii ecclesiae O filii ecclesie | Anonymous | Latin | 1 | 1 |
| 153 | O florens rosula | Anonymous | Latin | 1 | 0 |
| 726 | O flos post fructum purior | Anonymous | Latin | 0 | 0 |
| 892 | O gloriosa mater Christi Maria | Anonymous | Latin | 1 | 1 |
| 113 | O gloriosa trinitas | Anonymous | Latin | 2 | 1 |
| 72 | O Iesse virgula O Yesse virgula | Anonymous | Latin | 2 | 0 |
| 937 | O Iesu vivens - Ave caro O Ihesu vivens - Ave caro | Anonymous | Latin | 0 | 1 |
| 748 | O Jesse virgula | Anonymous | Latin | 0 | 0 |
| 192 | O lieben kind der christenheit | Anonymous | German | 0 | 1 |
| 436 | O lux beatissima | Anonymous | Latin | 0 | 0 |
