Langenhorst - Lünen
- Langenhorst (see Specials: Handschriftencensus Westfalen)St. Johannes
- Legden (see Specials: Handschriftencensus Westfalen)St. Brigida
- Leipzig Federal Administrative CourtGerman National Library: Book and Type MuseumCity Libraries: Music Library, Becker Collection, City History MuseumUniversity Library
- Lemgo (see also Specials: Manuscript Census Westphalia) City Archive (High School Library)
- Leverkusen-Bürrig (see Specials: Manuscript Census Rhineland, vol. 2) Cath. parish St. Stephanus
- Lichtenthal (see SU Karlsruhe) Monastery
- Lindlar (see Specials: Manuscript Census Rhineland, vol. 2) Cath. parish St. Severinus
- Lippborg (see Specials: Manuscript Census Westphalia) St. Cornelius and Cyprian
- Lippetal-Herzfeld (see Specials: Handschriftencensus Westfalen)St. Ida
- Lübeck City Library
- Lüdinghausen (see Specials: Manuscript Census Westphalia) St. Felicitas
- Lüneburg Council LibrarySt. Michael's Knights Academy
- Lünen (see Specials: Handschriftencensus Westfalen) St. Maria
- Lutherstadt Eisleben (see Specials: Eastern States)
- Lutherstadt Wittenberg (see Wittenberg)