Coregency in the context of "Princess"

Tamar the Great (Georgian: თამარ მეფე, romanized: tamar mepe [ˈt̪ʰämäɾ ˈme̞pʰe̞], lit. 'King Tamar'; c. 1160 – 18 January 1213) reigned as the Queen of Georgia from 1184 to 1213, presiding over the apex of the Georgian Golden Age. A member of the Bagrationi dynasty, her position as the first woman to rule Georgia in her own right was emphasized by the title mepe ("king"), afforded to Tamar in the medieval Georgian sources.

Tamar was proclaimed heir and co-ruler by her reigning father George III in 1178, but she faced significant opposition from the aristocracy upon her ascension to full ruling powers after George's death. Tamar was successful in neutralizing this opposition and embarked on an energetic foreign policy aided by the decline of the hostile Seljuk Turks. Relying on a powerful military elite, Tamar was able to build on the successes of her predecessors to consolidate an empire which dominated the Caucasus until its collapse under the Mongol attacks within two decades after Tamar's death.

The first Paréage of Andorra (Catalan: Tractat de pareatge) was a feudal charter signed in Lleida on 8 September 1278. It codified a lay and ecclesiastical agreement between the Count of Foix, Roger-Bernard III, and the Bishop of Urgell, Pere d'Urtx, establishing their joint sovereignty over the territory of Andorra. The paréage established the system of condominium in Andorra, placing it under suzerainty of both lords. This system was later ratified in 1993 by the signing of the Constitution of Andorra. The charter underpins the modern legal status of Andorra.

A second paréage was signed on 6 November 1288, which supplemented and addressed a number of clauses in the first paréage. Together, these two paréages comprised the first basic law of Andorra, and were the nation's most important constitutional documents until the ratification of the Constitution in 1993.

A monarch is the head of a monarchy, a form of government in which a state is ruled by an individual who normally rules for life or until abdication, and typically inherits the throne by birth. Monarchs may be autocrats (as in all absolute monarchies) or may be ceremonial figureheads, exercising only limited or no reserve powers at all, with actual authority vested in a legislature and/or executive cabinet (as in many constitutional monarchies). In many cases, a monarch will also be linked with a state religion. Most states only have a single monarch at any given time, although a regent may rule when the monarch is a minor, not present, or otherwise incapable of ruling. Cases in which two monarchs rule simultaneously over a single state, as is the current situation in Andorra, are known as coregencies.

A variety of titles are applied in English; for example, "king" and "queen", "prince" and "princess", "grand duke" and "grand duchess", "emperor" and "empress". Although they will be addressed differently in their local languages, the names and titles in the list below have been styled using the common English equivalent. Roman numerals, used to distinguish related rulers with the same name, have been applied where typical.

Diarchy (from Greek δι-, di-, "double", and -αρχία, -arkhía, "ruled"), duarchy, or duumvirate is a form of government characterized by co-rule, with two people ruling a polity together either lawfully or de facto, by collusion and force. The leaders of such a system are usually known as corulers.

Historically, diarchy particularly referred to the system of shared rule in British India established by the Government of India Acts 1919 and 1935, which devolved some powers to local councils, which had included native Indian representation under the Indian Councils Act 1892. 'Duumvirate' principally referred to the offices of the various duumviri established by the Roman Republic. Both, along with less common synonyms such as biarchy and tandemocracy, are now used more generally to refer to any system of joint rule or office. A monarchy temporarily controlled by two or more people is, however, usually distinguished as a coregency.

Thutmose III (variously also spelled Tuthmosis or Thothmes, Ancient Egyptian: 𓅝𓄟𓄤𓆣), sometimes called Thutmose the Great, (1479–1425 BC) was the fifth pharaoh of the 18th Dynasty of Egypt. He is regarded as one of the greatest warriors, military commanders, and military strategists of all time; as Egypt's preeminent warrior pharaoh and conqueror; and as a dominant figure in the New Kingdom period.

Officially, Thutmose III ruled Egypt from his coronation on 28 April 1479 BC at the age of two until his death on 11 March 1425 BC. But for the first 22 years of his reign, he was coregent with his stepmother and aunt, Hatshepsut, who was named the pharaoh. He became sole ruler after Hatshepsut's death in 1458.

The king or queen of Jerusalem was the supreme ruler of the Kingdom of Jerusalem, a Crusader state founded in Jerusalem by the Latin Catholic leaders of the First Crusade, when the city was conquered in 1099. Most of them were men, but there were also five queens regnant of Jerusalem, either reigning alone suo jure ("in her own right"), or as co-rulers of husbands who reigned as kings of Jerusalem jure uxoris ("by right of his wife").

Godfrey of Bouillon, the first ruler of the Kingdom of Jerusalem, refused the title of king choosing instead the title Advocatus Sancti Sepulchri, that is Advocate or Defender of the Church of the Holy Sepulchre. In 1100 Baldwin I, Godfrey's successor, was the first ruler crowned as king. The crusaders in Jerusalem were conquered in 1187, but their Kingdom of Jerusalem survived, moving the capital to Acre in 1191. Crusaders re-captured the city of Jerusalem in the Sixth Crusade, during 1229–1239 and 1241–1244.

Ivan V Alekseyevich (Russian: Иван V Алексеевич; 6 September [O.S. 27 August] 1666 – 8 February [O.S. 29 January] 1696) was Tsar of all Russia between 1682 and 1696, jointly ruling with his younger half-brother Peter I. Ivan was the youngest son of Alexis I of Russia by his first wife, Maria Miloslavskaya, while Peter was the only son of Alexis by his second wife, Natalya Naryshkina. Ivan's reign was solely titular because he had serious physical and mental challenges.