Archives are the current holding institutions of sources.
| Bischöfliche Zentralbibliothek (D-Rp) |
| Fürst Thurn und Taxis Hofbibliothek (D-Rtt) |
Organizations are corporate entities that have been involved in the history of a source, typically as an owner, creator, or seller.
| Gymnasium Poeticum |
| St. Emmeram Benedictine monastery |
| Town Council, Regensburg |
| parish church of Othmaring |
Sources that have had their origins in this city.