Mistress (lover) in the context of "Karin Månsdotter"

A royal mistress is the historical position and sometimes unofficial title of the extramarital lover of a monarch or an heir apparent, who was expected to provide certain services, such as sexual or romantic intimacy, companionship, and advice in return for security, titles, money, honours, and an influential place at the royal court. Thus, some royal mistresses have had considerable power, being the power behind the throne. The institution partly owes its prevalence to the fact that royal marriages used to be conducted solely on the basis of political and dynastic considerations, leaving little space for the monarch's personal preferences in the choice of a partner.

The title of royal mistress was never official, and most mistresses had an official reason to be at the court, such as being a lady-in-waiting or maid-of-honour to a female member of the royal family or a governess to the royal children. However, their real position was most often an open secret, and there was no real division between formal and informal political power in the early French court. From the 15th century onward and most importantly in France, chief mistresses gained a semi-official title (French: maîtresse-en-titre, literally "official mistress"), which came with its own assigned apartments in the palace. A chief mistress was also sometimes called a maîtresse déclarée, or "declared mistress". An unacknowledged, less important royal lover was known as a petite maîtresse ("little mistress").

A royal bastard is a child of a reigning monarch born out of wedlock. The king might have a child with a mistress, or the legitimacy of a marriage might be questioned for reasons concerning succession.

Notable royal bastards include Robert, Earl of Gloucester, son of Henry I of England, Henry FitzRoy, son of Henry VIII of England, and the Duke of Monmouth, son of Charles II. The Anglo-Norman surname Fitzroy means son of a king and was used by various illegitimate royal offspring, and by others who claimed to be such. In medieval England, a bastard's coat of arms was marked with a bend or baton sinister.

Rudolf, Crown Prince of Austria (Rudolf Franz Karl Josef; 21 August 1858 – 30 January 1889) was the only son and third child of Emperor Franz Joseph I and Empress Elisabeth of Austria. He was heir apparent to the imperial throne of the Austro-Hungarian Empire from birth. In 1889, he died in a suicide pact with his mistress Baroness Mary Vetsera at the Mayerling hunting lodge. The ensuing scandal made international headlines.

Cecilia Gallerani (Italian pronunciation: [tʃeˈtʃiːlja ɡalleˈraːni]; early 1473 – 1536) was the favourite and most celebrated of the many mistresses of Ludovico Sforza, known as Lodovico Il Moro, Duke of Milan. She is best known as the subject of Leonardo da Vinci's painting Lady with an Ermine (c. 1489). While posing for the painting, she invited Leonardo, who at the time was working as court artist for Sforza, to meetings at which Milanese intellectuals discussed philosophy and other subjects. Gallerani herself presided over these discussions.

A Harlot's Progress (also known as The Harlot's Progress) is a series of six paintings (1731, now destroyed) and engravings (1732) by the English artist William Hogarth. The series shows the story of a young woman, M. (Moll or Mary) Hackabout, who arrives in London from the country and becomes a prostitute. The series was developed from the third image. After painting a prostitute in her boudoir in a garret on Drury Lane, Hogarth struck upon the idea of creating scenes from her earlier and later life. The title and allegory are reminiscent of John Bunyan's Pilgrim's Progress.

In the first scene, an old woman praises her beauty and suggests a profitable occupation. In the second, she is a mistress with two lovers. In the third, she is a prostitute and is being arrested. In the fourth, she is beating hemp in Bridewell Prison. In the fifth scene, she is dying from venereal disease. In the last panel, she is dead at the age of 23.

John Corvinus (Hungarian: Corvin János, Croatian: Ivaniš Korvin, Romanian: Ioan Corvin; 2 April 1473 – 12 October 1504) was the illegitimate son of Matthias Corvinus, King of Hungary, and his mistress, Barbara Edelpöck.

Baroness Karoline Jagemann von Heygendorff (25 January 1777 in Weimar – 10 July 1848 in Dresden) was a major German tragedienne and singer. Her great roles included Elizabeth in Mary Stuart (1800) and Beatrice in The Bride of Messina (1803). She is also notable as a mistress of Karl August, Grand Duke of Saxe-Weimar-Eisenach, the father of her three children. Both she and Karl August had their portraits painted by Heinrich Christoph Kolbe.