Archives are the current holding institutions of sources.
| Historisches Archiv der Stadt (D-KNa) |
| Universitäts- und Stadtbibliothek (D-KNu) |
Organizations are corporate entities that have been involved in the history of a source, typically as an owner, creator, or seller.
| Cologne Charterhouse |
| Cologne Gymnasial-Bibliothek |
| Jesuit Library |
| St. Kunibert's Church |
Sources that have had their origins in this city.
| DK-Kk Fragm. 17a, inv. 2400-2409 |
| D-DS 876 |
| D-DS 2276 |