EuroVoc is a multilingual, multidisciplinary thesaurus covering the activities of the EU, the European Parliament in particular. It contains terms in 23 EU languages, plus in three languages of countries which are candidates for EU accession.
The EU Vocabularies website provides access to vocabularies managed by the EU institutions and bodies. This includes controlled vocabularies, schemas, ontologies, data models, etc. As part of the EU open data initiative, the EU Vocabularies site offers free public access to all of its content.