The Workers' Party of Belgium is a Marxist and socialist political party in Belgium. It is the only Belgian party represented in parliament that is a fully national party, representing both Flanders and Wallonia. Having historically been a small party, the PTB-PVDA has gained momentum since the 2010s, continuously scoring better at the elections, particularly in Wallonia and working-class communities in Brussels.

Flanders is the Dutch-speaking northern portion of Belgium and one of the communities, regions and language areas of Belgium. However, there are several overlapping definitions, including ones related to culture, language, politics, and history, and sometimes involving neighbouring countries. The demonym associated with Flanders is Fleming, while the corresponding adjective is Flemish, which can also refer to the collective of Dutch dialects spoken in that area, or more generally the Belgian variant of Standard Dutch. The official capital of Flanders is the City of Brussels, although the Brussels-Capital Region that includes it has an independent regional government. The powers of the government of Flanders consist, among others, of economic affairs in the Flemish Region and the community aspects of Flanders life in Brussels, such as Flemish culture and education.