Toledo-Utrecht
- Toledo. Catedral de Toledo. Biblioteca. Manuscript. 39.12. [Pontifical from Toledo][164] manuscript leaves: illustrations, music. 3842.515.19.3 (microfilm).
- Toledo. Catedral de Toledo. Biblioteca. Manuscript. 44-2. [Antiphonal with Aquitanian notation]220 manuscript leaves. Music. 3842.515.19.1 (microfilm).
- Toledo. Catedral de Toledo. Biblioteca. Manuscript. 52.11. [Missal of Arezzo][370] leaves: illustrations, music. 3842.515.19.5 (microfilm).
- Toledo. Catedral de Toledo. Biblioteca. Manuscript. Res. 56.19. [Pontifical written in France][188] manuscript leaves: illustrations, music. 3842.515.19.4 (microfilm).
- Toledo. Catedral de Toledo. Biblioteca. Manuscript. Res. 9. [Roman pontifical][118] leaves: illustrations, music. 3842.515.19.6 (microfilm).
- Toulouse. Bibliothèque municipale. Manuscript. 118. [Pontifical from Lodeve]222 manuscript leaves: illustrations, music. 3845.89.118 (microfilm).
- Toulouse. Bibliothèque municipale. Manuscript. 119. [Pontifical from Lisieux][184] manuscript leaves: illustrations, music. 3845.89.119 (microfilm).
- Toulouse. Bibliothèque municipale. Manuscript. 94. [Missal followed by kyriale]1 manuscript volume of music. 3845.89.94 (microfilm).
- Tours. Bibliothèque municipale. Manuscript. 236. [Pontifical from Cuenca, later used in Saintes][126] manuscript leaves: illustrations, music. 4845.860.79.1 (microfiche).
- Tours. Bibliothèque municipale. Manuscript. 927. [Liturgical dramas]292 manuscript leaves. Music. 3845.860.79.1 (microfilm).
- Trento. Biblioteca comunale. Manuscript. 1947/1 [Germanic gradual][24] leaves: illustrations, music. 3848.5.11 (1) (microfilm).
- Trier. Stadtbibliothek. Manuscript. 322/1994. [Manuscript containing sermons and music in mensural notation]215 manuscript leaves: music. Manuscript. Original in Stadtbibliothek Trier (D TRs). 3847.461.77.1 (microfilm).
- Troyes. Bibliothèque de Troyes. Manuscript. 1047. [Notated missal, from Sens, usage of Troyes][222] manuscript leaves: illustrations, music. 4848.667.24.9 (1-38) (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 109. [Breviary from Marmoutier-la-Celle]372 manuscript leaves. Music. 3848.667.24.2 (microfilm).
- Troyes. Bibliothèque de Troyes. Manuscript. 1241. [Fragment of a pontifical from Treves][28] manuscript leaves: illustrations, music. 4848.667.24.2 (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 1341. [Pontifical romanum from Constantinople][75] manuscript leaves: illustrations, music. 4848.667.24.3 (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 155. [Missal from Troyes][213] manuscript leaves: illustrations, music. 4848.667.24.11 (1-37) (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 1951. [Missal from Reims][236] manuscript leaves: illustrations, music. 4848.667.24.10 (1-40) (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 2140, fol. 46v-96. [Pontifical from Langres]Leaves 46v-96: music. 4848.667.24.4 (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 2141. [Pontifical from Germany][134] manuscript leaves: music. 4848.667.24.5 (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 2262. [Pontifical from Chalons-sur-Marne][175] manuscript leaves: music. 4848.667.24.6 (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 522. [Missal][162] manuscript leaves: illustrations, music. 4848.667.24.1 (1-23) (microfiche).
- Troyes. Bibliothèque de Troyes. Manuscript. 571. [Breviary from St. Loup de Troyes]257 manuscript leaves. Illustrations, music. 3848.667.24.1 (microfilm).
- Troyes. Bibliothèque de Troyes. Manuscript. 720. [Breviary from St. Loup de Troyes]343 manuscript leaves. Music. 3848.667.24.3 (microfilm).
- Troyes. Bibliothèque de Troyes. Manuscript. 894. [Notated missal from Saint-Père de Chartres][238] leaves: illustrations, music. 4848.667.24.8 (1-41) (microfiche).
- Troyes. Cathedrale de Saint-Pierre-et-Saint-Paul. Tresor de la cathedrale. Manuscript. 4. [Pontifical from Troyes][185] manuscript leaves: illustrations, music. 4848.667.25.1 (microfilm).
- Turin. Biblioteca nazionale. Manuscript. F IV 18. [Gradual from Bobbio, followed by kyriale, sequences, litany of saints]177 manuscript leaves. Illustrations, music. 3853.76.21 (microfilm).
- Turin. Biblioteca nazionale. Manuscript. F IV 4. [Antiphonal from Bobbio]1 manuscript volume of music. 3853.76.20 (microfilm).
- Turin. Biblioteca nazionale. Manuscript. F IV 4. [Homiliary of Bobbio]233 manuscript leaves 3853.76.24 (microfilm).
- Turin. Biblioteca nazionale. Manuscript. G V 20 [Gradual from Bobbio, preceded by calendar, followed by litanies, processional antiphons, tropes, and sequences for feasts]182 manuscript leaves. Music. 3853.76.23 (microfilm).
- Udine. Biblioteca Arcivescovile. Manuscript. 79. [Notated breviary from Pomposa][314] manuscript leaves: illustrations, music. Olim F.20.III.5. 3857.462.24.4 (microfilm).
- Udine. Biblioteca arcivescovile. Manuscript. 234. [Gradual and tropary from S. Emmerano di Ratisbona][72] manuscript leaves: illustrations, music. 3857.462.24.3 (microfilm).
- Udine. Biblioteca arcivescovile. Manuscript. 78. [Gradual and sacramentary from Weingarten, with sequences and tropes][125] manuscript leaves: illustrations, music. 3857.462.24.2 (microfilm).
- Udine. Biblioteca arcivescovile. Manuscript. oct. 2. [Gradual from the diocese of Aquilea][191] manuscript leaves: illustrations, music. 3857.462.24.1 (microfilm).
- Utrecht. Rijksuniversiteit. Bibliotheek. Manuscript. 406. [Antiphonal of St. Mary of Utrecht]256 manuscript leaves. 4861.734.12.1 (microfiche).