https://mandadb.hu/ (HUNGARIAN NATIONAL DIGITAL ARCHIVES)
The start page is in Hungarian. You'll have to use your Google Translator to get to some English. Here is what the Hungarian National Digital Archives has to say"
Back in 2015, the Hungarian government decided that it was necessary to prepare a digitization strategy, which would encompass the entire Hungarian public collection institution system as a long-term plan. Experts from Forum Hungaricum also took part in the creation of the strategy, together with professional and interest representation organizations, with the involvement of actors from the market, civil and scientific spheres . The strategy was completed in 2017 as part of the Digital Nation Development Program. The finalization was preceded by a dialogue and social consultation process.