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- Saffron Walden, TL
- Saint-Brieuc, Bibliothèque André Malraux (Bibliothèque municipale)
- Saint-Mihiel, BM
- Saint-Omer, BM
- Saint-Petersbourg, Bibliothèque impériale
- Saint-Quentin, Médiathèque Guy de Maupassant (Bibliothèque municipale)
- Sala Consilina, Archivio di San Pietro
- Salamanca, Bibl. univ.
- Salins, BM
- Salisbury, Cath
- Salzburg, St. Peter
- San Daniele del Friuli, Biblioteca Civica Guarneriana
- San Francisco, SF State Univ.
- San Gimignano, Biblioteca Comunale 'Ugo Nomi Venerosi Pesciolini'
- San Marino, The Huntington Libr.
- Sankt Florian, StB
- Sankt Gallen, StB
- Sankt Gallen, Stiftsarchiv
- Sankt Gallen, Vadiana
- Sankt Paul, StB
- Sankt Pölten, Diözesanbibliothek
- Sarnano, Biblioteca Comunale
- Saumur, Bibliothèque municipale
- Schaffhausen, Stadtbibliothek
- Schlierbach, Stiftsbibl.
- Seitenstetten, Klosterbibl.
- Sélestat, BM
- Semur-en-Auxois, BM
- Sevilla, Bibl. Cap. y Colombina
- Sheffield, UL
- Shrewsbury, School
- Sibenik (Sebenico), Samostana franjevaca konv.
- Siena, Bibl. com.
- Silos, Archivio de la Abadia
- Sion, Archives du Chapitre
- Soissons, BM
- Solothurn, Zentralbibl.
- Sopron, Győr-Moson Megye Soproni Levéltára
- Spoleto, Arch. del Duomo
- St Albans, ASA
- Stockholm, Kungliga Bibl.
- Stockholm, Musée national
- Stonyhurst, C
- Strasbourg, Bibl. nat. et univ.
- Stuttgart, WLB
- Sydney, State Library of New South Wales