''Katherine'' is a work of HistoricalFiction by Anya Seton. It tells the story of major events in Fourteenth Century England from the perspective of Katherine de Roet, a yeoman's daughter, who becomes the mistress and eventual wife of John of Gaunt, the Duke of Lancaster.

''Katherine'' was relatively well-researched and tries to be historically accurate wherever historical facts are attested. It is commonly found on lists of the best works of HistoricalFiction.

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!This novel provides examples of the following:

* AllPsychologyIsFreudian: John of Gaunt is first drawn to Katherine because she reminds of him of a beloved childhood nurse. He is also haunted by the accusation of a childhood companion that he is a foundling.
** Teenage Blanchette has a lot of MommyIssues that come to a head when an older boy she has a crush on clearly prefers Katherine... and then she overhears a friar accuse her mother of murdering her father. [[spoiler: Katherine and Duke John didn't know till that moment that Hugh, her husband was murdered by a PoisonousFriend of the Duke's]].
* ArrangedMarriage:
** Katherine and Hugh Swynford, ''de facto'' if not ''de jure''
** Plenty of others (this is the European nobility after all) including some of Katherine and John's daughters
** Averted with [[spoiler: Blanchette]], who avoided her unwanted arranged marriage by [[spoiler: catching scarlett fever]] and then [[spoiler: running away delirious and joining a convent]].
* BadGuysDoTheDirtyWork: [[spoiler: Nirac murders Hugh Swynford (who he always hated) when he learned that his patron, the Duke of Lancaster, was frustrated that Swynford wasn't dying of his war wounds.]]
* BewareTheSillyOnes: [[spoiler: Nirac de Bayonne]]
* BigFancyHouse: Subverted with Hugh Swynford's rundown estate, Kettlethorpe.
* TheBlackDeath: [[spoiler: it kills off Blanche.]]
* CrazyCatLady: Mentally fragile Lady Nichola who lives in isolation at Kettlethorpe with only a kitten for company.
* ControlFreak: Katherine's sister Phillipa
* DeathOfTheHypotenuse:
** [[spoiler: Hugh Swynford]]
** [[spoiler: Infinata Costanza, John of Gaunt's second wife, daughter of the deposed King of Castile]]
* EmoTeen: Blanchette
* GemEncrusted: Several items throughout the novel. Most especially:
** Some of the holy relics in Waltham Abbey.
** Anything worn by RichardTheSecond.
* HaveAGayOldTime: Subverted. Describing Nirac, Seton writes: "He was gay." She meant he had a playful demeanor, of course. But Nirac probably was a homosexual.
* HeroesWantRedheads: The Duke of Lancaster, Hugh Swynford, and Roger de Cheyne, all skilled warriors, have a thing for the redheaded Katherine. On the other hand, GeoffreyChaucer the poet isn't really interested.
* IncorruptiblePurePureness: Blanche, the Duchess of Lancaster, John of Gaunt's first wife
* JerkAss: Hugh Swynford
* JerkassHasAPoint: When Katherine first arrives at the castle her sisters and the ladies-in-waiting see her as a mere country bumpkin. The much-hated Alice Perrers however points out that Katherine is gorgeous and the men will see this if they can't.
* LonelyDollGirl: Katherine's teenage daughter Blanchette who spends most of her time in her chamber playing with puppets.
* LoveTriangle: Katherine, John of Gaunt, and Hugh Swynford
* TheMistress:
** Alice Perrers, to King Edward, and a shameless one at that
** Katherine, to John of Gaunt, during his second marriage
* NeatFreak: Again, Katherine's sister Phillipa
* MadWomanInTheAttic: Lady Nichola Swynford, Hugh's abused and mentally unstable stepmother, who has lived in isolation at the rundown manor Kettlethorpe for years. Katherine fears that she will become like Lady Nichola herself if compelled to live alone at Kettlethorpe, and later has the same misgivings about her reclusive daughter Blanchette.
* MommyIssues: John of Gaunt and Blanchette
* OldRetainer: Gibbon, to the Swynfords
* ThePhilosopher: Whenever GeoffreyChaucer meets someone, or encounters some new situation, he internally philosophizes--sometimes in [[Literature/TheCanterburyTales beautiful poetic verse]]--on that person's future and human life in general.
* ThePlague: Of course; this is 14th Century England. Specific cases:
** [[spoiler: Isolda Neumann, John of Gaunt's foster mother till age eight]], died during TheBlackDeath.
** [[spoiler: Blanche, the Duchess of Lancaster]]
** [[spoiler: Katherine]], but [[spoiler:she caught it as a child and survived]].
* PlanetOfSteves: Justified, for historical accuracy.
** Quite a few female characters are named Phillipa. (Evidently many people named their daughters after the Queen.) GeoffreyChaucer invoked the trope to explain why they instead call Katherine's sister Pica.
** Averted with Katherine's daughter Blanche, who is named for the Duchess of Lancaster. The younger Blanche is called Blanchette throughout.
** Katherine has two sons named Tom (one to Hugh, one to John of Gaunt), both born on the feast of St. Thomas. She calls the younger one Tamkin.
* PersonalHorror: John of Gaunt is mortified as a child when accused by Pieter Neumann of being a [[SwitchedAtBirth changeling]].
* PrettyBoy: Young Richard II. Scarcely an appearance by him goes by where his girlish prettiness is not remarked on.
* RoyalBrat: RichardTheSecond, so very much
* RoyalsWhoActuallyDoSomething: John of Gaunt especially, as well as some of his brothers. King Edward was said to have been this in his younger days, before the story.
* SeekingSanctuary:
** Pieter Neumann sought refuge in a church after being discovered by John of Gaunt, thus saving his life, but not preventing him from being exiled.
** [[spoiler: Blanchette, after realizing Katherine's connection to her father Hugh Swynford's death.]]
* ShotgunWedding: Katherine's middle-class friend Hawise is only allowed to marry her boyfriend after she gets pregnant
* SpiritedYoungLady: Katherine.
* TakingTheVeil: Blanchette.
* TheUnfavourite: Catalina, John of Gaunt's daughter with his unloved second wife, Constanza. He is indifferent even when her life is endangered during the rebellion. But he winces when his tearful young wife mentions 'he often doesn't want to see Catalina' when they are reunited. He hadn't realized how obvious he was.
* WhenSheSmiles: Katherine thought Blanche was plain-looking when she first saw her at a royal dinner, but when Blanche smiled, she thought Blanche was the most beautiful person she'd ever seen