History of Belgium on matters of religion and, in recent decades, it has faced new divisions over differences of language and unequal economic development. This ongoing antagonism has caused far-reaching reforms since the 1970s, changing the formerly unitary Belgian state into a federal state, and repeated governmental crises. It is now divided into three regions: Flanders (Dutch-speaking) in the north, Wallonia (French-speaking) in the south, and bilingual Brussels in the middle. There is also a German-speaking population along the border with Germany that was granted to Prussia in the Congress of Vienna in 1815 but added to Belgium following the 1919 Treaty of
Royal Flemish Academy of Belgium for Science and the Arts created and from then on until 1971 Flemish scientists were either member of the Dutch-language Flemish academy or member of the officially bilingual ARB. This situation created confusion sometimes. As a consequence of the first state reform in Belgium in 1970, the officially bilingual Royal Academy was dissolved in 1971 and replaced by a solely French-speaking academy, ARB, for the French speaking community and a solely Dutch-speaking academy, KAWLSK, for the Flemish community. Almost 30 years later on, KAWLSK was renamed KVAB ("Koninklijke Vlaamse Academie van België voor Wetenschappen en Kunsten") in 1999. Royal Flemish Academy of Belgium for Science