1478

Events

• February 18 - George, Duke of Clarence, convicted of treason against his older brother Edward IV of England, is privately executed in the Tower of London.
• April 26 - The Pazzi attack Lorenzo de' Medici and kill his brother Giuliano during High Mass in the Florence Cathedral.
• December 28 - Battle of Giornico - Swiss troops defeat the Milanese.
• Lorenzo de' Medici becomes sole ruler of Florence
• Grand Prince Ivan III of Moscow conquers Novgorod
• Vladislav II of Bohemia makes peace with Hungary
• Iskender succeeds his father Baeda Maryam as Emperor of Ethiopia at the age of six.

Births

• February 7 - Sir Thomas More, English statesman and humanist author (d. 1535)
• December 6 - Baldassarre Castiglione, Italian writer and diplomat (d. 1529)
• Pope Clement VII (d. 1534)

Deaths

• February 18 - George, Duke of Clarence, brother of Edward IV of England and Richard III of England (executed) (b. 1449)
• April 26 - Giuliano di Piero de' Medici (assassinated) (b. 1453)
• Baeda Maryam , Emperor of Ethiopia (b. 1448)