Charles III in the context of "Queen of Scotland"

The House of Schleswig-Holstein-Sonderburg-Glücksburg, also known by its short name as the House of Glücksburg, is the senior surviving branch of the German House of Oldenburg, one of Europe's oldest royal houses. Oldenburg house members have reigned at various times in Denmark, Norway, Sweden, Iceland, Greece, several northern German states, and Russia. It takes its name from the family seat in Glücksburg, a small town in Schleswig-Holstein, Germany.

Current monarch King Charles III and King Harald V, former monarch Queen Margrethe II and former consorts Queen Anne-Marie of Greece and Queen Sofia of Spain are patrilineal members of cadet branches of the House of Glücksburg.

Saint Kitts and Nevis, officially the Federation of Saint Kitts and Nevis, is an island country located in the Caribbean consisting of the two islands of Saint Kitts and Nevis, in the Leeward Islands chain of the Lesser Antilles. With 261 square kilometres (101 sq mi) of territory, and roughly 48,000 inhabitants, it is the smallest sovereign state in the Western Hemisphere, in both area and population, as well as the world's smallest sovereign federation. The country is a Commonwealth realm, with Charles III as king and head of state.

The capital city is Basseterre, located on the larger island of Saint Kitts. Basseterre is also the main port for passenger entry (via cruise ships) and cargo. The smaller island of Nevis lies approximately 3 km (2 mi) to the southeast of Saint Kitts, across a shallow channel called The Narrows.

A monarchy is a hereditary form of government in which political power is legally passed on to the family members of the monarch, a head of state who rules for life. While monarchs gain their power depending on specific succession laws, they can also gain their authority via election.

Monarchies were the most common form of government until the 20th century, when republics replaced many monarchies, notably at the end of World War I. As of 2025, forty-three sovereign nations in the world have a monarch, including fifteen Commonwealth realms that share King Charles III as their head of state. Other than that, there is a range of sub-national monarchical entities. Most of the modern monarchies are constitutional monarchies, retaining under a constitution unique legal and ceremonial roles for monarchs exercising limited or no political power, similar to heads of state in a parliamentary republic.

The Order of Merit (French: Ordre du Mérite) is an order of merit for the Commonwealth realms, recognising distinguished service in the armed forces, science, art, literature, or the promotion of culture. Established in 1902 by Edward VII, admission into the order remains the personal gift of its Sovereign—currently Edward VII's great-great-grandson Charles III—and is restricted to a maximum of 24 living recipients from the Commonwealth realms, plus honorary members. While all members are awarded the right to use the post-nominal letters OM and wear the badge of the order, the Order of Merit's precedence among other honours differs between countries.

Belize is a country on the north-eastern coast of Central America. It is bordered by Mexico to the north, the Caribbean Sea to the east, and Guatemala to the west and south. It also shares a maritime boundary with Honduras to the southeast. Despite being in central America, Belize identifies with the Caribbean region, and is a member of the Caribbean Community (CARICOM) and the Commonwealth Caribbean, the historical British West Indies.

The Maya civilization spread into the area of Belize between 1500 BCE and 300 CE and flourished until about 1200. European contact began in 1502–04 when Christopher Columbus sailed along the Gulf of Honduras. European exploration was begun by English settlers in 1638. Spain and Britain both laid claim to the land until Britain defeated the Spanish in the Battle of St. George's Caye (1798). It became a British colony in 1840, and a Crown colony in 1862. Belize achieved its independence from the United Kingdom on 21 September 1981. It is the only mainland Central American country which is a Commonwealth realm, with King Charles III as its monarch and head of state, represented by a governor-general.

The Government of Canada (French: gouvernement du Canada), formally His Majesty's Government (French: Gouvernement de Sa Majesté), is the body responsible for the federal administration of Canada. The term Government of Canada refers specifically to the executive, which includes ministers of the Crown (together in the Cabinet) and the federal civil service (whom the Cabinet direct); it is corporately branded as the Government of Canada. There are over 100 departments and agencies, as well as over 300,000 persons employed in the Government of Canada. These institutions carry out the programs and enforce the laws established by the Parliament of Canada.

The federal government's organization and structure was established at Confederation, through the Constitution Act, 1867, wherein the Canadian Crown acts as the core, or "the most basic building block", of its Westminster-style parliamentary democracy. The monarch, King Charles III is head of state and is personally represented by a governor general (currently Mary Simon). The prime minister (currently Mark Carney) is the head of government, who is invited by the Crown to form a government after securing the confidence of the House of Commons, which is typically determined through the election of enough members of a single political party in a federal election to provide a majority of seats in Parliament, forming a governing party. Further elements of governance are outlined in the rest of the Canadian constitution, which includes written statutes in addition to court rulings and unwritten conventions developed over centuries.

The House of Windsor is the current royal house of the United Kingdom and other Commonwealth realms. The house's name was inspired by the historic Windsor Castle estate. The house was founded on 17 July 1917, when King George V changed the name of the royal house from the German Saxe-Coburg and Gotha to the English Windsor due to anti-German sentiment during the First World War. There have been five British monarchs of the House of Windsor: George V, Edward VIII, George VI, Elizabeth II, and Charles III. The children and male-line descendants of Queen Elizabeth II and Prince Philip, Duke of Edinburgh, also genealogically belong to the House of Oldenburg since Philip was by birth a member of the Glücksburg branch of that house.

The monarch is head of state of fifteen sovereign states. These are the United Kingdom, Antigua and Barbuda, Australia, The Bahamas, Belize, Canada, Grenada, Jamaica, New Zealand, Papua New Guinea, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Solomon Islands, and Tuvalu. As well as these separate monarchies, there are also three Crown Dependencies, fourteen British Overseas Territories, two associated states of New Zealand, and one territory.