Sovereignty in the context of Palazzo Malta

Polis (pl.: poleis) means 'city' in Ancient Greek. The ancient word polis had socio-political connotations not possessed by modern usage. For example, Modern Greek πόλη (póli), "city", is located within a χώρα (chóra), "country", which is a πατρίδα (patrída) or "native land" for its citizens. In ancient Greece, the polis was the native land; there was no other. It had a constitution and demanded the supreme loyalty of its citizens. Χώρα was only the countryside, not a country. Ancient Greece was not a sovereign country, but was territory occupied by Hellenes, people who claimed as their native language some dialect of Ancient Greek.

Poleis did not only exist within the area of the modern Republic of Greece. A collaborative study carried by the Copenhagen Polis Centre from 1993 to 2003 classified about 1,500 settlements of the Archaic and Classical ancient-Greek-speaking population as poleis. These ranged from the Caucasus to Southern Spain, and from Southern Russia to Northern Egypt, spread over the shores of the Mediterranean and Black Sea. They have been termed a network of micro-states. Many of the settlements still exist; e.g., Marseille, Syracuse, Alexandria, but they are no longer Greek or micro-states, belonging to other countries.

A city-state is an independent sovereign city which serves as the center of political, economic, and cultural life over its contiguous territory, as opposed to a regular state or country comprising a capital city and other cities and/or a countryside. City-states have existed in many parts of the world throughout history, including cities such as Rome, Carthage, Athens and Sparta and the Italian city-states during the Middle Ages and Renaissance, such as Florence, Venice, Genoa and Milan.

With the rise of nation states worldwide, there remains some disagreement on the number of modern city-states that still exist; Singapore, Monaco and Vatican City are the candidates most commonly discussed. Out of these, Singapore is the largest and most populous city-state in the world, with full sovereignty, international borders, its own currency, a robust military, and substantial international influence in its own right. The Economist refers to it as the "world's only fully functioning city-state".

A political union is a type of political entity which is composed of, or created from, smaller polities or the process which achieves this. These smaller polities are usually called federated states and federal territories in a federal government; they are called prefectures, regions, or provinces in the case of a centralised government. This form of government may be created through voluntary and mutual cession and is described as unionism by its constituent members and proponents. In other cases, it may arise from political unification, characterised by coercion and conquest. The unification of separate states which, in the past, had together constituted a single entity is known as reunification. Unlike a personal union or real union, the individual constituent entities may have devolution of powers but are subordinate to a central government or coordinated in some sort of organization. In a federalised system, the constituent entities usually have internal autonomy, for example in the setup of police departments, and share power with the federal government, for whom external sovereignty, military forces, and foreign affairs are usually reserved. The union is recognised internationally as a single political entity. A political union may also be called a legislative union or state union.A union may be effected in many forms, broadly categorized as:

• Incorporating union
• Incorporating annexation
• Federal union
• Federative annexation
• Mixed unions

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.

The Government of Japan is the central government of Japan. It consists of legislative, executive and judiciary branches and functions under the framework established by the Constitution of Japan. Japan is a unitary state, containing forty-seven administrative divisions, with the emperor as its head of state. His role is ceremonial and he has no powers related to the Government. Instead, it is the Cabinet, comprising the prime minister and the ministers of state, that directs and controls the government and the civil service. The Cabinet has the executive power and is formed by the prime minister, who is the head of government. The Prime Minister is nominated by the National Diet and appointed to office by the Emperor. The current cabinet is the Takaichi Cabinet, which is led by prime minister Sanae Takaichi, who assumed office on 21 October 2025. The country has had a Liberal Democratic minority government since 2025.

The National Diet is the legislature, the organ of the Legislative branch. The Diet is bicameral, consisting of two houses with the House of Councilors being the upper house, and the House of Representatives being the lower house. The members of both houses of the Diet are directly elected by the people, who are the source of sovereignty. The Diet is defined as the supreme organ of sovereignty in the Constitution. The Supreme Court and other lower courts make up the Judicial branch and have all the judicial powers in the state. The Supreme Court has ultimate judicial authority to interpret the constitution and the power of judicial review. The judicial branch is independent from the executive and the legislative branches. Judges are nominated or appointed by the Cabinet and never removed by the executive or the legislature except during impeachment.

Self-governance, self-government, self-sovereignty or self-rule is the ability of a person or group to exercise all necessary functions of regulation without intervention from an external authority. It may refer to personal conduct or to any form of institution, such as family units, social groups, affinity groups, legal bodies, industry bodies, religions, and political entities of various degrees. Self-governance is closely related to various philosophical and socio-political concepts such as autonomy, independence, self-control, self-discipline, and sovereignty.

In the context of nation states, self-governance is called national sovereignty which is an important concept in international law. In the context of administrative division, a self-governing territory is called an autonomous region. Self-governance is also associated with political contexts in which a population or demographic becomes independent from colonial rule, absolute government, absolute monarchy, or any government that they perceive does not adequately represent them. It is therefore a fundamental tenet of many democracies, republics and nationalist governments. Mahatma Gandhi's term "swaraj" is a branch of this self-rule ideology. Henry David Thoreau was a major proponent of self-rule in lieu of immoral governments.

A sovereign state is a state that has the highest authority over a territory. It is commonly understood that a sovereign state is independent. When referring to a specific polity, the term "country" may also refer to a constituent country, or a dependent territory.

A sovereign state is required to have a permanent population, defined territory, a government not under another, and the capacity to interact with other sovereign states. In actual practice, recognition or non-recognition by other states plays an important role in determining the status of a country. Unrecognized states often have difficulty engaging in diplomatic relations with other sovereign states.

A dependent territory, dependent area, or dependency (sometimes referred as an external territory) is a territory that does not possess full political independence or sovereignty as a sovereign state and remains politically outside the controlling state's integral area.

A dependent territory is commonly distinguished from a country subdivision by being considered not to be a constituent part of a sovereign state. An administrative subdivision, instead, is understood to be a division of a state proper. A dependent territory, conversely, often maintains a great degree of autonomy from its controlling state. Historically, most colonies were considered to be dependent territories. Not all autonomous entities are considered to be dependent territories. Most inhabited, dependent territories have their own ISO 3166 country codes.

The following is a list providing an overview of sovereign states around the world with information on their status and recognition of their sovereignty.

The 205 listed states can be divided into three categories based on membership within the United Nations System: 193 UN member states, 2 UN General Assembly non-member observer states, and 10 other states. The sovereignty dispute column indicates states having undisputed sovereignty (189 states, of which there are 188 UN member states and one UN General Assembly non-member observer state), states having disputed sovereignty (14 states, of which there are 5 UN member states, 1 UN General Assembly non-member observer state, and 8 de facto states), and states having a special political status (two states, both in free association with New Zealand).

A federated state (also state, province, region, canton, land, governorate, oblast, emirate, or country) is a territorial and constitutional community forming part of a federation. A federated state does not have international sovereignty since powers are divided between the other federated states and the federal government. Unlike international sovereign states, which have what is often referred to as Westphalian sovereignty (such as exercised by their federal government), federated states operate under their domestic or federal law with relation to the rest of the world.

Federated states do not have automatic standing as entities of international law. Instead, the federal union (federation) as a single entity is the sovereign state for purposes of international law. Depending on the constitutional structure of a particular federation, a federated state can hold various degrees of legislative, judicial, and administrative jurisdiction over a defined geographic territory and is a form of regional government. A federated state may nonetheless establish offices internationally, for example, to promote trade or tourism, while still operating only within the trade policy or other applicable law of their federation, and their host country. They also may enter into international regional agreements under the laws of their federation and state, such as to protect a cross-border resource like water or other shared matters.

Regionalism is a political ideology that seeks to increase the political power, influence and self-determination of the people of one or more subnational regions. It focuses on the "development of a political or social system based on one or more" regions, and/or the national, normative, or economic interests of a specific region, group of regions or another subnational entity, gaining strength from or aiming to strengthen the "consciousness of and loyalty to a distinct region with a homogeneous population", similarly to nationalism. More specifically, "regionalism refers to three distinct elements: movements demanding territorial autonomy within unitary states; the organization of the central state on a regional basis for the delivery of its policies including regional development policies; political decentralization and regional autonomy".

Regions may be delineated by administrative divisions, culture, language and religion, among others. Regionalists' demands occur in "strong" forms (such as sovereigntism, separatism, sovereignty, secession and independence), as well as more "moderate" campaigns for greater autonomy (such as states' rights, decentralization or devolution). Strictly speaking, regionalists favour confederations over unitary nation states with strong central governments. They may, however, embrace intermediate forms of federalism. Proponents of regionalism usually claim that strengthening the governing bodies and political powers within a region, at the expense of a centralized government, will benefit local populations by improving regional or local economies, in terms of better fiscal responsibility, regional development, allocation of resources, implementation of localist policies and plans, competitiveness among regions and, ultimately, the whole country, consistent with the principle of subsidiarity.

A federal territory is an administrative division under the direct and usually exclusive jurisdiction of a federation's national government. A federal territory is a part of a federation, but not a part of any federated state. The states constitute the federation itself and share sovereignty with the federal government, while a territory does not have sovereign status and is constitutionally dependent on the federal government.

Real union is a union of two or more states, which share some state institutions in contrast to personal unions; however, they are not as unified as states in a political union. It is a development from personal union and has historically been limited to monarchies.

Unlike personal unions, real unions almost exclusively led to a reduction of sovereignty for the politically weaker constituent. That was the case with Lithuania and Norway, which came under the influence of stronger neighbors, Poland and Denmark respectively, with which each of them had shared a personal union previously.

Hades (/ˈheɪdiːz/; Ancient Greek: ᾍδης, romanized: Hā́idēs, Attic Greek: [háːi̯dεːs], later [háːdeːs]), in the ancient Greek religion and mythology, is the god of the dead and riches and the King of the underworld, with which his name became synonymous. Hades was the eldest son of Cronus and Rhea, although this also made him the last son to be regurgitated by his father. He and his brothers, Zeus and Poseidon, defeated, overthrew, and replaced their father's generation of gods, the Titans, and claimed joint sovereignty over the cosmos. Hades received the underworld, Zeus the sky, and Poseidon the sea, with the solid earth, which was long the domain of Gaia, available to all three concurrently. In artistic depictions, Hades is typically portrayed holding a bidentand wearing his helm with Cerberus, the three-headed guard-dog of the underworld, standing at his side.

Roman-era mythographers eventually equated the Etruscan god Aita,and the Roman gods Dis Pater and Orcus, with Hades, and merged all these figures into Pluto, a Latinisation of Plouton (Ancient Greek: Πλούτων, romanized: Ploútōn), itself a euphemistic title (meaning "the rich one") often given to Hades.

A tributary state is a pre-modern state in a particular type of subordinate relationship to a more powerful state which involved the sending of a regular token of alliance, or tribute, to the superior power (the suzerain). This token often took the form of a substantial transfer of wealth, such as the delivery of gold, produce, or slaves, so that tribute might best be seen as the payment of protection money. It might also be more symbolic: sometimes it amounted to no more than the delivery of a mark of alliance such as the bunga mas (golden flower) that rulers in the Malay Peninsula used to send to the kings of Siam, or the Tribute of the Maltese Falcon that the Grand Master of the Order of St. John used to send annually to the Viceroy of Sicily in order to rule Malta. It might also involve attendance by the subordinate ruler at the court of the hegemon in order to make a public show of submission.

The modern-day heirs of tribute hegemons tend to claim that the tributary relationship should be understood as an acknowledgement of the hegemon's sovereignty in the modern world, whereas former tributary states deny that there was any transfer of sovereignty.

Nationalism is an ideology or movement that holds that the nation should be congruent with the state. As a movement, it presupposes the existence and tends to promote the interests of a particular nation, especially with the aim of gaining and maintaining its sovereignty (self-determination) over its perceived homeland to create a nation-state. It holds that the nation should govern itself, free from outside interference (self-governance), that a nation is a natural and ideal basis for a polity, and that the nation is the only rightful source of political power. It further aims to build and maintain a single national identity, based on a combination of shared social characteristics such as culture, ethnicity, homeland, language, politics (or government), religion, traditions or belief in a shared singular history, and to promote national unity or solidarity. There are various definitions of a "nation", which leads to different types of nationalism. The two main divergent forms are ethnic nationalism and civic nationalism.

The moral value of nationalism, the relationship between nationalism and patriotism, and the compatibility of nationalism and cosmopolitanism are all subjects of philosophical debate. Nationalism can be combined with diverse political goals and ideologies such as conservatism (national conservatism and right-wing populism) or socialism (left-wing nationalism).