While it is true that the renaissance began in Italy (and when we think of it is impossible not to think on names like Raphael, Giovanni Bellini, Petrarch or Botticelli) and then expanded to other regions of Europe; how much is known about this period in, say, Brandenburg, the principality of Lithuania, the kingdom of Hungary ?
I am not sure I understand Your question (is it
"how much is known about Renaissance in other regions these days" or
"how known was Renaissance in other regions at the time" ).
So I'll answer on the two possible interpretations of Your question:
- "how much is known about the Renaissance in other regions"- by the "general public" not that much. Petrarca, Michelangelo, Gesualdo, Italy in general, are occupying the front stage, hiding a lot of very valuable Renaissance elswhere.
- "how known was Renaissance in other regions at the time"
In Hungary's case, it isn't about how known was Renaissance: Hungary was fully into. Hungarian historiography even talks about Hungary being the first country affected/adopting the Italian Renaissance. And there is some truth into it as Hungary of the time had extremely close links to Italy, a lot of its intellectuals came from Italy or studied in Italy, plus (and that is important) had the mecena needed. It was rich country and governed by King Matthias, educated by Italian preceptors, married to an Italian, speaking Italian, open-minded, cultivated and ... extremely rich, as other magnates in the kingdom were too.
An example:
Girolamo Diruta publishes in 1593
"Il Transilvano - Dialogo sopra il vero modo di sonar organi & stromenti da penna " (The Transylvanian - dialogues on the true way of playing organs and pinched instruments" - it remains even today an important landmark in musicology). What would seem nowadys a somehow odd title for a Venetian musical treaty comes from his collocutor, a certain Istvan de Jósika (a Hungarian), envoy of Zsigmond Báthory in Italy, prince of Transylvania, duke of Opole (Silezia), nephew of the Polish King.
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On Hungary, You have a small presentation here:
Google Traduction , original in Hungarian here:
Magyarországi reneszánsz