Andorra in the context of "Joint monarchs"

The European Union Customs Union (EUCU), formally known as the Community Customs Union, is a customs union which consists of all the member states of the European Union (EU), Monaco, and the British Overseas Territory of Akrotiri and Dhekelia. Some detached territories of EU states do not participate in the customs union, usually as a result of their geographic separation. In addition to the EUCU, the EU is in customs unions with Andorra, San Marino and Turkey (with the exceptions of certain goods), through separate bilateral agreements.

There are no tariffs or non-tariff barriers to trade between the members of the customs union and—unlike a free trade area—members of the customs union impose a common external tariff on all goods entering the union.

Spain is a country located in southwestern Europe occupying most (about 82 percent) of the Iberian Peninsula. It also includes a small exclave inside France called Llívia, as well as the Balearic Islands in the Mediterranean, the Canary Islands in the Atlantic Ocean 108 km (67 mi) off northwest Africa, and five places of sovereignty (plazas de soberanía) on and off the coast of North Africa: Ceuta, Melilla, Islas Chafarinas, Peñón de Alhucemas, and Peñón de Vélez de la Gomera.

The Spanish mainland is bordered to the south and east almost entirely by the Mediterranean Sea (except for the small British territory of Gibraltar); to the north by France, Andorra, and the Bay of Biscay; and to the west by the Atlantic Ocean and Portugal. With a land area of 504,782 square kilometres (194,897 sq mi) in the Iberian Peninsula, Spain is the largest country in Southern Europe, the second largest country in Western Europe (behind France), and the fourth largest country in the European continent (behind Russia, Ukraine, and France). It has an average altitude of 650 m.

A microstate or ministate is a sovereign state having a very small population or land area, usually both. However, the meanings of "state" and "very small" are not well-defined in international law. Some recent attempts to define microstates have focused on identifying qualitative features that are linked to their size and population, such as partial delegation of their sovereignty to larger states, such as for international defense.

Commonly accepted examples of microstates include five historic European microstates: Andorra, Liechtenstein, Monaco, San Marino, and Vatican City. Malta and Luxembourg are sometimes included in that list but are generally considered too populous to be genuine microstates. Other examples are small, isolated island states in the Pacific Ocean: Nauru, Palau, Niue, Cook Islands and Tuvalu. Some small Caribbean countries such as Saint Kitts and Nevis, Barbados, Antigua and Barbuda, Grenada, Saint Vincent and the Grenadines may be considered microstates by some but are often not included due to them being grouped together as small island countries. Singapore and Bahrain are sometimes considered microstates but some argue are too populous, self reliant or powerful to be considered true microstates and their island status can play an important factor too.The smallest political entity recognized as a sovereign state is Vatican City, with fewer than 1,000 residents and an area of only 49 hectares (120 acres). Some microstates – such as Singapore, Monaco and Vatican City – are city-states consisting of a single municipality.

Southern Europe is also known as Mediterranean Europe, as its geography is marked by the Mediterranean Sea. Definitions of southern Europe include some or all of these countries and regions: Albania, Andorra, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Gibraltar, Greece, Italy, Kosovo, Malta, Monaco, Montenegro, North Macedonia, Portugal, San Marino, Serbia, Slovenia, southern France, southern Romania, Spain, Ticino (Switzerland), Turkey, and Vatican City.

Southern Europe is focused on the three peninsulas located in the extreme south of the European continent. These are the Iberian Peninsula, the Italian Peninsula, and the Balkan Peninsula. These three peninsulas are separated from the rest of Europe by towering mountain ranges, respectively by the Pyrenees, the Alps and the Balkan Mountains. The location of these peninsulas in the heart of the Mediterranean Sea, as well as their mountainous reliefs, provide them with very different types of climates (mainly subtropical Mediterranean) from the rest of the continent. So, the Sirocco hot wind that originates in the heart of the Sahara blows over Italy, going up to the interior of the Alpine arc (Po Valley). The Alps prevent the Sirocco from spreading to the rest of Europe. And, conversely, the Alps and the Pyrenees protect the Italian and Iberian Peninsulas from the rains and icy winds from the south of France such as the Mistral and the Tramontane. When the Mistral and the Tramontane are blowing, this provokes an "upwelling" phenomenon on the French coast. They push the surface waters out to sea and bring deeper, cooler waters up to the seaside. Consequently, the temperature of the waters of the French coasts are therefore very cool even in summer, and not representative of the rest of the Mediterranean.This same kind of phenomenon takes place between the two slopes of the Balkan mountain range. These mountains have, moreover, been a serious handicap to population displacement, focusing southern Europe mainly on the Mediterranean world. The climate and cultures are therefore very specific.

The Iberian Peninsula (IPA: /aɪˈbɪəriən/ eye-BEER-ee-ən), also known as Iberia, is a peninsula in south-western Europe. Mostly separated from the rest of the European landmass by the Pyrenees, it includes the territories of Peninsular Spain and Continental Portugal, comprising most of the region, as well as the tiny adjuncts of Andorra, Gibraltar, and, pursuant to the traditional definition of the Pyrenees as the peninsula's northeastern boundary, a tiny part of France. With an area of approximately 583,254 square kilometres (225,196 sq mi), and a population of roughly 56 million, it is the second-largest European peninsula by area, after the Scandinavian Peninsula.

Spain, officially the Kingdom of Spain, is a country in Southern and Western Europe with territories in North Africa. Featuring the southernmost point of continental Europe, it is the largest country in Southern Europe and the fourth-most populous European Union (EU) member state. Spanning the majority of the Iberian Peninsula, its territory also includes the Canary Islands, in the Eastern Atlantic Ocean; the Balearic Islands, in the Western Mediterranean Sea; and the autonomous cities of Ceuta and Melilla, in mainland Africa. Peninsular Spain is bordered to the north by France, Andorra, and the Bay of Biscay; to the east and south by the Mediterranean Sea and Gibraltar; and to the west by Portugal and the Atlantic Ocean. Spain's capital and largest city is Madrid; other major urban areas include Barcelona, Valencia, Seville, Zaragoza, Málaga, Murcia, and Palma de Mallorca.

In early antiquity, the Iberian Peninsula was inhabited by Celts, Iberians, and other pre-Roman peoples. The Roman conquest of the Iberian peninsula created the province of Hispania, which became deeply Romanised and later Christianised. After the fall of the Western Roman Empire, the peninsula was conquered by tribes from Central Europe, among them the Visigoths, who established the Visigothic Kingdom centred on Toledo. In the early 8th century, most of the peninsula was conquered by the Umayyad Caliphate, with Al-Andalus centred on Córdoba. The northern Christian kingdoms of Iberia launched the so-called Reconquista, gradually repelling and ultimately expelling Islamic rule from the peninsula, culminating with the fall of the Nasrid Kingdom of Granada. The dynastic union of the Crown of Castile and the Crown of Aragon in 1479 under the Catholic Monarchs is often seen as the de facto unification of Spain as a nation state.

France, officially the French Republic, is a country primarily located in Western Europe. Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the North Atlantic, the French West Indies, and many islands in Oceania and the Indian Ocean, giving it the largest discontiguous exclusive economic zone in the world. Metropolitan France shares borders with Belgium and Luxembourg to the north; Germany to the northeast; Switzerland to the east; Italy and Monaco to the southeast; Andorra and Spain to the south; and a maritime border with the United Kingdom to the northwest. Its metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea. Its 18 integral regions—five of which are overseas—span a combined area of 632,702 km (244,288 sq mi) and have an estimated total population of over 68.6 million as of January 2025. France is a semi-presidential republic. Its capital, largest city and main cultural and economic centre is Paris.

Metropolitan France was settled during the Iron Age by Celtic tribes known as Gauls before Rome annexed the area in 51 BC, leading to a distinct Gallo-Roman culture. In the Early Middle Ages, the Franks formed the kingdom of Francia, which became the heartland of the Carolingian Empire. The Treaty of Verdun of 843 partitioned the empire, with West Francia evolving into the Kingdom of France. In the High Middle Ages, France was a powerful but decentralised feudal kingdom, but from the mid-14th to the mid-15th centuries, France was plunged into a dynastic conflict with England known as the Hundred Years' War. In the 16th century French culture flourished during the French Renaissance, and a French colonial empire emerged. Internally, France was dominated by the conflict with the House of Habsburg and the French Wars of Religion between Catholics and Huguenots. France was successful in the Thirty Years' War and further increased its influence during the reign of Louis XIV.

Latin America (Spanish and Portuguese: América Latina; French: Amérique Latine) is the cultural region of the Americas where Romance languages are predominantly spoken, primarily Spanish and Portuguese. Latin America is defined according to cultural identity, not geography, and as such it includes countries in both North and South America. Most countries south of the United States tend to be included: Mexico and the countries of Central America, South America and the Caribbean. Commonly, it refers to Hispanic America plus Brazil. Related terms are the narrower Hispanic America, which exclusively refers to Spanish-speaking nations, and the broader Ibero-America, which includes all Iberic countries in the Americas and occasionally European countries like Spain, Portugal and Andorra. English- and Dutch-speaking countries and territories, although in the same geographical region, are excluded (Suriname, Guyana, the Falkland Islands, Jamaica, Trinidad and Tobago, Belize, etc.).

The term Latin America was first introduced in 1856 at a Paris conference titled, literally, Initiative of the Americas: Idea for a Federal Congress of the Republics (Iniciativa de la América. Idea de un Congreso Federal de las Repúblicas). Chilean politician Francisco Bilbao coined the term to unify countries with shared cultural and linguistic heritage. It gained further prominence during the 1860s under the rule of Napoleon III, whose government sought to justify France's intervention in the Second Mexican Empire.

In European history, monarchy was the prevalent form of government throughout the Middle Ages, only occasionally competing with communalism, notably in the case of the maritime republics and the Swiss Confederacy.

In the early modern period (1500 - 1800 CE), Republicanism became more prevalent, but monarchy still remained predominant in Europe until the end of the 19th century. After World War I, however, most European monarchies were abolished. There remain, as of 2025, twelve sovereign monarchies in Europe. Seven are kingdoms: Denmark, Norway, Sweden, the United Kingdom, Spain, the Netherlands, and Belgium. Three are principalities: Andorra, Liechtenstein, and Monaco. Finally, Luxembourg is a grand duchy and Vatican City is a theocratic, elective monarchy ruled by the pope.