1400

Year 1400 was a (link will display the full calendar) of the.

Events of 1400

 * is declared as a rival to the to Emperor . However, Frederick is murdered shortly after.
 * - The princes of the states vote to depose  as  due to his weak leadership and his mental illnesses.
 * -, of the , is elected as.
 * defeats both the and the  Sultanate of  to capture the city of  in present-day . Much of the city's inhabitants are subsequently massacred by Timur's troops.
 * conquers the in present-day  and the  Dynasty in present-day . Black Sheep ruler  and Jalayirid Sultan  flee and take refuge with the  Sultan.
 * January - quells the  and executes the s of,  and  and the   for their attempt to have  restored as King.
 * - dies by means unknown in . It is likely that King  ordered the death of Richard by starvation to prevent further uprisings.
 * - is proclaimed  by his followers and begins attacking  strongholds in north-east.
 * resists an invasion led by.
 * In present-day, King abdicates in fear of an attack by his ambitious younger brother, . Taejong succeeds to the throne.
 * Prince establishes the  in present-day western  and northern.
 * Five year old Tran An is forced to abdicate as ruler of Dai Viet (now ) in favour of his maternal grandfather Ho Quy Ly, ending the and starting the . Ho Quy Ly subsequently changes the country's name to Dai Ngu.
 * Hananchi succeeds Min as King of in present-day north,.
 * (now southern ) resists an invasion by the.
 * completes his  detailing the events of the 14th Century in.
 * The family becomes powerful in.
 * December - becomes the first (and last)  to visit.
 * is reported to have around 52 million inhabitants.

Births

 * -, the (†)
 * -, Lord Lieutenant of Ireland (died )
 * date unknown
 * (died )
 * , Florentine sculptor (died )
 * (died )
 * , English politician (died )
 * , Welsh courtier (died )

Deaths

 * , English politician (executed)
 * , English politician (executed) (born )
 * -, English politician (executed)
 * -, English politician (executed)
 * - King (probably murdered) (born )
 * -, Italian jurist (born )
 * -, rival
 * -, English poet
 * date unknown
 * , Indian mathematician (born )
 * , English scholar (born )
 * , English scholar (born )