| ID | Title  | Author | Language | Number of records | Number of melodies |
|---|---|---|---|---|---|
| 94 | In auro fulvo | Anonymous | Latin | 1 | 0 |
| 705 | In conflictu nobili | Anonymous | Latin | 0 | 0 |
| 637 | In dulci iubilo singet und seid froh singet und seytt fro, singit und sit vro | Anonymous | Latin-German | 0 | 0 |
| 568 | In dulci iubilo všickni In dulci iubilo všichni | Anonymous | Latin-Czech | 0 | 0 |
| 40 | In festivitate huius diei | Anonymous | Latin | 1 | 1 |
| 221 | In hac die decantemus | Anonymous | Latin | 1 | 1 |
| 775 | In hac die gloriosa | Anonymous | Latin | 0 | 0 |
| 377 | In hac praecelsa solemnitate In hac precelsa sollempnitate | Anonymous | Latin | 0 | 0 |
| 126 | In hoc anni circulo | Anonymous | Latin | 2 | 1 |
| 493 | In hoc festo domino | Anonymous | Latin | 2 | 1 |
| 369 | In hoc festo maeste maesto In hoc festo meste mesto | Anonymous | Latin | 0 | 0 |
| 350 | In hoc festo sanctissimo | Anonymous | Latin | 0 | 0 |
| 222 | In laudem Mariae tendo In laudem Marie tendo | Anonymous | Latin | 2 | 1 |
| 378 | In laudem matris hodie | Anonymous | Latin | 0 | 0 |
| 645 | In laudem matris piae In laudem matris pie | Anonymous | Latin | 1 | 0 |
| 112 | In laudem sancti spiritus | Anonymous | Latin | 2 | 1 |
| 266 | In laudibus infantium | Anonymous | Latin | 0 | 0 |
| 186 | In matutinis patris sapientia | Anonymous | Latin | 0 | 0 |
| 495 | In natali domini | Anonymous | Latin | 0 | 1 |
| 706 | In natali summi regis | Anonymous | Latin | 0 | 1 |
