What is John of Gaunt?
{{Infobox royalty | name = John of Gaunt | image = Johnofgaunt.jpg | caption = A portrait commissioned c. 1593 by Sir [[Edward Hoby]] for [[Queenborough Castle]], Kent, probably modelled on Gaunt's tomb effigy in [[Old St Paul's Cathedral]].{{sfn|Harris|2010|p=16}} His [[tabard]] shows the [[royal arms of Castile and León]] impaling his [[Label (heraldry)|differenced]] Plantagenet arms, while on the shield Castile and León is shown as an inescutcheon of pretence, representing his claim to that kingdom by right of marriage to [[Constance of Castile, Duchess of Lancaster|Constance of Castile]]. | image_size = 250px | succession = [[Duke]] of [[Lancaster]]; Duke of [[Aquitaine]] | successor = [[Henry IV of England|Henry Bolingbroke]] | succession1 = [[King of Castile]] | moretext1 = (claimant) | reign1 = 29 January 1372 – 8 July 1388 | reign-type1 = Claimed | spouse = {{marriage|[[Blanche of Lancaster]]|1359|1368|end=d.}}<br>{{marriage|[[Constance of Castile, Duchess of Lancaster|Infanta Constance of Castile]]|1371|1394|end=d.}}<br>{{marriage|[[Katherine Swynford]]|1396}} | issue = {{plainlist| * [[Philippa of Lancaster|Philippa, Queen of Portugal]] * [[Elizabeth of Lancaster, Duchess of Exeter|Elizabeth, Duchess of Exeter]] * [[Henry IV of England]] * [[Catherine of Lancaster|Catherine, Queen of Castile]] * [[John Beaufort, 1st Earl of Somerset]] * [[Cardinal (Catholicism)|Cardinal]] [[Henry Beaufort]] * [[Thomas Beaufort, Duke of Exeter]] * [[Joan Beaufort, Countess of Westmorland]]}} | house = {{plainlist| * [[House of Plantagenet]] ''(by birth)'' * [[House of Lancaster]] ''(founder)''}} | father = [[Edward III of England|Edward III, King of England]] | mother = [[Philippa of Hainault]] | birth_date = {{Birth date|1340|3|6|df=yes}} | birth_place = [[Ghent]], [[County of Flanders|Flanders]] (now in [[Belgium]]) | death_date = {{Death date and age|1399|2|3|1340|3|6|df=yes}} | death_place = [[Leicester