Prince-Bishopric of Liège in the context of "United Kingdom of the Netherlands"

For most of its history, what is today Belgium was either a part of a larger territory, such as the medieval Carolingian Empire, or was divided into a number of smaller states. In the Middle Ages, the territory of present-day Belgium was fragmented into numerous feudal principalities, including the Duchy of Lower Lorraine, the Duchy of Brabant, the County of Flanders, the Prince-Bishopric of Liège, the County of Namur, the County of Hainaut and the County of Luxembourg. Belgium's modern shape can be traced back at least as far as the southern core of the medieval Burgundian Netherlands. The Eighty Years' War (1568–1648) later led to the split between a northern Dutch Republic and the Southern Netherlands from which Belgium and Luxembourg developed. The area, long a Habsburg stronghold, briefly came under Bourbon control during the War of the Spanish Succession. The resulting Peace of Utrecht transferred the area back to Habsburg control, creating what is now known as the Austrian Netherlands. The French Revolutionary wars led to Belgium becoming part of France in 1795. After the defeat of the French in 1814, the Congress of Vienna created two new states, the United Kingdom of the Netherlands and the Grand Duchy of Luxembourg, which were placed in dynastic union under the House of Orange-Nassau. The Southern Netherlands rebelled during the 1830 Belgian Revolution, establishing the modern Belgian state, officially recognized at the London Conference of 1830. The first King of Belgium, Leopold I, assumed the throne in 1831.

The first half of the twentieth century was tumultuous. Its historic neutrality was violated in each of the World Wars. During World War I, frustrated German invaders launched the Rape of Belgium. During the 1940 invasion, the quick surrender by Leopold III of Belgium to German forces drove a wedge between the King and his people. The King's attempt to return led to a constitutional crisis in 1950, which led to his abdication in favor of his son Baudouin. Belgium entered the second half of the twentieth century showing an unprecedented era of economic growth, as Belgium took an active role in the formation of the Benelux customs union with its neighbors. Ultimately, the Benelux union would serve as a model for the European Economic Community, a precursor to the European Union; to this day Brussels serves as the seat of many of the European Union institutions.

The Southern Netherlands, also called the Catholic Netherlands, were the parts of the Low Countries belonging to the Holy Roman Empire which were at first largely controlled by Habsburg Spain (Spanish Netherlands, 1556–1714) and later by the Austrian Habsburgs (Austrian Netherlands, 1714–1794) until occupied and annexed by Revolutionary France (1794–1815).

The region also included a number of smaller states that were never ruled by Spain or Austria: the Prince-Bishopric of Liège, the Imperial Abbey of Stavelot-Malmedy, the County of Bouillon, the County of Horne and the Princely Abbey of Thorn.

Theodor de Bry (also Theodorus de Bry; 1528 – 27 March 1598) was a Walloon engraver, goldsmith, editor and publisher, famous for his depictions of early European expeditions to the Americas. The Spanish Inquisition forced de Bry, a Protestant, to flee his native, Spanish-controlled Southern Netherlands. He moved around Europe, starting from his birth on the city of Liège in the Prince-Bishopric of Liège, then to Strasbourg, Antwerp, London and Frankfurt, where he settled.

De Bry created a large number of engraved illustrations for his books. Most of his books were based on first-hand observations by explorers, even if De Bry himself, acting as a recorder of information, never visited the Americas. To modern eyes, many of the illustrations seem formal but detailed.

Ourthe (French pronunciation: [uʁt] ; Dutch: Ourte; German: Urt) was a department of the French First Republic and French First Empire in present-day Belgium and Germany. It was named after the river Ourthe (Oûte). Its territory corresponded more or less with that of the present-day Belgian province of Liège and a small adjacent region in North Rhine-Westphalia in Germany. It was created on 1 October 1795, when the Austrian Netherlands and the Prince-Bishopric of Liège were officially annexed by the French Republic. Before this annexation, the territory included in the department had lain partly in the Prince-Bishopric of Liège, the Abbacy of Stavelot-Malmedy, the Duchies of Limburg and Luxembourg, and the County of Namur.

After Napoleon was defeated in 1814, most of the department became part of the United Kingdom of the Netherlands as the province of Liège. The easternmost part (Eupen, Malmedy, Sankt Vith, Kronenburg, Schleiden) became part of the Prussian Rhine Province; part of this (Eupen, Malmedy and Sankt Vith) was taken back into Liège province after the First World War, under the Treaty of Versailles.

Limburg (Dutch: Limburg, pronounced [ˈlɪmbʏr(ə)x] ; Limburgish: Limburg [ˈlɪm˦ˌbʏʀ˦əx] or Wes-Limburg [wæsˈlɪm˦ˌbʏʀ˦əx]; French: Limbourg, pronounced [lɛ̃buʁ] ), also known as Belgian Limburg, is a province in Belgium. It is the easternmost of the five Dutch-speaking provinces that together form the Region of Flanders, which is one of the three main political and cultural sub-divisions of modern-day Belgium. As of January 2024, Limburg had a population of 0.9 million.

Limburg is located west of the Meuse (Dutch: Maas), which separates it from the similarly named Dutch province of Limburg. To the south it shares a border with the French-speaking province of Liège, with which it also has historical ties. To the north and west are the old territories of the Duchy of Brabant. Today these are the Flemish provinces of Flemish Brabant and Antwerp to the west, and the Dutch province of North Brabant to the north. Historically Belgian Limburg is roughly equivalent to the Dutch-speaking part of the secular lordship of the medieval Prince-Bishopric of Liège, which was dominated by the County of Loon.

The Old University of Leuven (or of Louvain) is the name historians give to the university, or studium generale, founded in Leuven, Brabant (then part of the Burgundian Netherlands, now part of Belgium), in 1425. The university was closed in 1797, a week after the cession to the French Republic of the Austrian Netherlands and the principality of Liège (jointly the future Belgium) by the Treaty of Campo Formio.

The name was in medieval Latin Studium generale Lovaniense or Universitas Studii Lovaniensis, in humanistical Latin Academia Lovaniensis, and most usually, Universitas Lovaniensis, in Dutch Universiteyt Loven and also Hooge School van Loven.

Cambrésis (French: [kɑ̃bʁezi], Dutch: Kamerijk, German: Kammerich) is a former pagus and county of the medieval Holy Roman Empire, which constituted the Prince-Bishopric of Cambrai from the 11th to the 18th centuries. It was annexed by the Kingdom of France in 1679. It is now regarded as one of the "natural regions" of France, and roughly equivalent to the Arrondissement of Cambrai in department Nord. The capital of Cambrésis was Cambrai. Originally ruled by a dynasty of counts, Cambrésis became a prince-bishopric in 1007, comparable to the Prince-Bishopric of Liège and the Prince-Bishopric of Utrecht. It encompassed the territory in which the bishop of Cambrai had secular authority.

Kleinstaaterei (German: [ˌklaɪnʃtaːtəˈʁaɪ], lit. 'small-state-ery') is a pejorative term coined in the early nineteenth century to denote the territorial fragmentation of Germany. While the term referred primarily to the territorial fragmentation of the German Confederation, it is also applied by extension to the even more extreme territorial fragmentation of the Holy Roman Empire. In this period, Germany was split into a great number of nearly sovereign small and medium-sized secular and ecclesiastical principalities and free imperial cities, some of which were little larger than a single town or the surrounding grounds of the monastery of an Imperial abbey. Estimates of the total number of German states at any time during the 18th century vary, ranging from 294 to 348, or more. However, the number of states rapidly decreased with the onset of German mediatisation in the early 19th century.

Territorial fragmentation was compounded by the fact that, due to the haphazard territorial formation of many states or the partition of dynastic states through inheritance, a very large number of Holy Roman Empire states were constituted of non-contiguous parts, which resulted in many enclaves and exclaves.