The population of Brussels numbers 951,580, most of whom speak French. While the southern Walloons are French speakers, the northern Flemish peoples speak Dutch. A small German enclave also exists in Liège. About one-third of the Brussels populace is made up of foreigners, many of whom work at the European Union and North Atlantic Treaty Organization (NATO) headquarters. The majority of Brussels inhabitants are Roman Catholic; however, there is also an active Jewish community, and Turkish migratory workers, who are Muslim, have a sizable community as well. Tensions between the more affluent Flemish and the poorer Walloons have existed for centuries.