- TLG: https://stephanus-tlg-uci-edu.uaccess.univie.ac.at/
- Regesta Imperii: http://www.regesta-imperii.de/startseite.html
- Pinakes: https://pinakes.irht.cnrs.fr/notices/cote/67696/
- Dumbarton Oaks Seal-Collection: https://www.doaks.org/resources/seals/byzantine-seals#b_start=0
- The Byzantine Legacy: https://www.thebyzantinelegacy.com/
[Work in Progress]