Aachen - Aurich
- Aachen
Public Library of the City,
Diocesan Archives, Cathedral Archives, Cathedral Treasury, City Archives, Suermondt-Ludwig-Museum (see Specials: Manuscript Census Rhineland, Vol. 1)
- Ahaus (district) (see Specials: Westphalia)
- Ahlen (see Specials: Handschriftencensus Westfalen)
St. Marien
- Ahrweiler (under: Bad Neuenahr-Ahrweiler)
- Altena (see Specials: Handschriftencensus Westfalen)
Museum des Märkischen Kreises
- Altenberge (see Specials: Handschriftencensus Westfalen)
St. Johannes Baptist
- Angermünde (see Specials: Eastern States) Museum of Local History
- Ansbach
State Library (Palace Library)
Historical Society for Middle Franconia (Today scattered collection)
- Arolsen
Fürstlich Waldecksche Hofbibliothek (FWHB) (see Kassel, Landesbibliothek and Murhardsche Bibliothek)
- Asbeck (see Specials: Handschriftencensus Westfalen)
St. Margareta
- Aschaffenburg Court Library City Library, Collegiate Church
- Attendorn (see Specials: Handschriftencensus Westfalen)
Südsauerlandmuseum