Databases
Premium service
Arcanum Newspapers
https://adtplus.arcanum.hu/en/
Free services
Arcanum Reference Library
https://www.arcanum.hu/online-kidvanyok/
Hungaricana - Hungarian Cultural Heritage Portal
https://hungaricana.hu/
MAPIRE - Historical Maps Online
http://mapire.eu/
Other services
Matricula
https://matricula-online.eu/
Őskereső
http://www.oskereso.hu/