Welcome!

EuroVoc is a multilingual thesaurus (controlled vocabulary) maintained by the Publications Office of the European Union and hosted on the portal Europa.

EuroVoc defines Central and Eastern Europe at
 
https://op.europa.eu/en/web/eu-vocabularies/concept/-/resource?uri=http://eurovoc.europa.eu/914
with the following 21 countries:

Albania, Belarus, Bosnia and Herzegovina, Bulgaria,

Caucasus countries: Armenia, Azerbaijan, Georgia;

Croatia, Czechia, Hungary, Kosovo, Moldova, Montenegro,

North Macedonia, Poland, Romania, Russia,

Serbia, Slovakia, Slovenia, Ukraine