Sillon industriel in the context of Brussels–Charleroi Canal

Liège (/liˈɛʒ, liˈeɪʒ/ lee-EZH, lee-AYZH; French: [ljɛʒ] ; Walloon: Lîdje [liːtʃ]; Dutch: Luik [lœyk] ; German: Lüttich [ˈlʏtɪç] ) is a city and municipality in the Belgian region of Wallonia, and the capital of the eponymous province. The city is situated in the valley of the Meuse, in the east of Belgium, not far from borders with the Netherlands (Maastricht is about 33 km (20.5 mi) to the north) and with Germany (Aachen is about 53 km (32.9 mi) north-east). In Liège, the Meuse meets the river Ourthe. The city is part of the sillon industriel, the former industrial backbone of Wallonia. It still is the principal economic and cultural centre of the region.

The municipality consists of the following sub-municipalities: Angleur, Bressoux, Chênée, Glain, Grivegnée, Jupille-sur-Meuse, Liège proper, Rocourt, and Wandre. In January 2022, Liège had 195,278 inhabitants. The metropolitan area, including the outer commuter zone, covers an area of 1,879 km (725 sq mi) and had a total population of 749,110 on 1 January 2008. This includes a total of 52 municipalities, among others, Herstal and Seraing. Liège ranks as the third most populous urban area in Belgium, after Brussels and Antwerp, and the fourth municipality after Antwerp, Ghent and Charleroi. The city is part of the Meuse-Rhine Euroregion.

The Parliament of Wallonia (French: Parlement de Wallonie, pronounced [paʁləmɑ̃ də walɔni]), or the Walloon Parliament (Parlement wallon, [paʁləmɑ̃ walɔ̃]) in the decrees, is the legislative body of Wallonia, one of the three self-governing regions of Belgium (the other two being Flanders and the Brussels-Capital Region). The parliament building, the former Hospice Saint-Gilles, is situated in Namur, the capital of Wallonia, at the symbolic confluence of the Meuse and the Sambre, the two main rivers of the most inhabited parts of Wallonia, the Sillon industriel. On the other side of the Meuse, facing the Parliament, is the Élysette, the seat of the Government of Wallonia.

The Sambre (French: [sɑ̃bʁ]) is a river in northern France and in Wallonia, Belgium. It is a left-bank tributary of the Meuse, which it joins in the Wallonian capital Namur.

The source of the Sambre is near Le Nouvion-en-Thiérache, in the Aisne department. It passes through the Franco-Belgian coal basin, formerly an important industrial district. The navigable course begins in Landrecies at the junction with the Canal de la Sambre à l'Oise, which links with the central French waterway network (or did, until navigation was interrupted in 2006 following structural failures). It runs 54 km and 9 locks 38.50 m long and 5.20 m wide down to the Belgian border at Jeumont. From the border the river is canalised in two distinct sections over a distance of 88 km with 17 locks. The Haute-Sambre is 39 km long and includes 10 locks of the same dimensions as in France, down to the industrial town of Charleroi. The rest of the Belgian Sambre was upgraded to European Class IV dimensions (1350-tonne barges) in the immediate post-World War II period. It lies at the western end of the sillon industriel, which is still Wallonia's industrial backbone, despite the cessation of all the coal-mining and a decline in the steel industry. The river flows into the Meuse at Namur, Belgium.

The Haine (French: Haine [ɛn] ; Dutch: Hene [ɦeːnə]; German: Henne; Picard: Héne; Walloon: Hinne) is a river in southern Belgium (Hainaut) and northern France (Nord), right tributary of the river Scheldt. The Haine gave its name to the County of Hainaut, and the present province of Hainaut. Its source is in Anderlues, Belgium. As the western end of the sillon industriel, Wallonia's industrial backbone, it flows through the heavily industrialized Borinage region, notably the towns La Louvière, Mons and Saint-Ghislain. A few kilometres after crossing the border into France, the Haine flows into the Scheldt in Condé-sur-l'Escaut. Its length within Belgium is 72 km (45 mi) and the Belgian part of its drainage basin is 802 km (310 sq mi).