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
German-speaking Community of Belgium cultural matters, but it still remains part of the region of predominantly French-speaking Wallonia. There has been much argument in the past few years that the German-speaking Community should also become its own region, which is an ongoing process with the permanent transfer with the previous accord of some competences concerning social policy, conservation of sites and monuments, environment protection policy, transport, the financing of municipalities, among other things from the Walloon Region. One of the proponents of full regional autonomy for the German-speaking Community is Karl-Heinz Lambertz, the minister-president from 1999 to 2014. Especially regional autonomy for spatial planning,