1483

January–March

• January 7 -
• *At Pau, Queen Catalina becomes the new ruler of Navarre at the age of 14, upon the death of her older brother, the 15-year-old King Francisco Febo. Their mother, Magdalena of Valois, continues as regent of Navarre.
• *Ivan IV becomes the new Grand Prince of the semi-independent Principality of Ryazan upon the death of his father, Vasily Ivanovich of Ryazan.
• January 8 - Following the appointment of the Duke of Albany as Lieutenant-General of the Realm, King James III of Scotland is restored to the throne after having been captured in battle on July 22, 1482.
• January 20 - The English Parliament, summoned by King Edward IV on November 15, assembles at Westminster.
• January - Upon the petition the Grand Inquistitor of Castile Tomás de Torquemada, the Jews are expelled from the Castilian-controlled portions of Andalusia.
• February 11 - The General Council of the Inquisition is created in Spain.
• February 18 - King Edward IV gives royal assent to numerous acts passed by the English Parliament.
• March 20 - In what is now the Kingdom of Spain, the Islamic Emirate of Granada defeats the Christian Crown of Castile in the Battle of Axarquía, despite the Castilians having four times as many troops as the Granadans.

  April–June

• April 9 - At the age of 12, Edward V becomes King of England upon the sudden death of his father, King Edward IV. The young king will reign for only 78 days before being deposed, imprisoned and murdered by his uncle, Richard III.
• April 29 - Gran Canaria, the main island of the Canary Islands, is conquered by the Kingdom of Castile, a very important step in the expansion of Spain. Of 4,000 Castilian troops, 800 are killed and 1,600 others are taken as prisoners of war.
• April 30 - Pluto moves inside Neptune's orbit until July 23, 1503, according to modern orbital calculations. At the time, neither planet has been discovered by Earth astronomers. The event of Pluto being closer to the Sun than Neptune will happen again during the period lasting from 1979 to 1999.
• May 18 - The coronation of Hans of Oldenburg as King of Denmark takes place at the Church of Our Lady in Copenhagen.
• May 19 - King Edward V moves into the Tower of London, the traditional residence of monarchs prior to a coronation. King Edward's coronation had recently been rescheduled for June 25.
• June 9 - The Grand Duke Ivan IV of Ryazan signs a treaty with his uncle, Grand Duke Ivan III of Moscow, placing Ryazan under Moscow's control and end—ing Ryazan's independence.
• June 13 - William Hastings, 1st Baron Hastings, is executed, in the first recorded execution at the Tower of London.
• June 16 - Richard, Duke of York, the younger brother of King Edward V, arrives at the Tower of London.
• June 20 - The powerful Duke Fernando II of Braganza is executed in Portugal, followed by more than 80 other noblemen, for his plot against the royal crown.
• June 25 - On the day of his scheduled coronation, 12-year-old King Edward V is deposed by his uncle, Richard, Duke of Gloucester, who is acclaimed by the English Parliament as King Richard III.

  July–September

• July 6 - Richard III and Anne Neville are crowned king and Queen of England, at Westminster Abbey.
• July 20 - The coronation of Hans, King of Denmark as crowned King of Norway is held at Nidaros Cathedral in Trondheim.
• August 15 - The Sistine Chapel opens in the Apostolic Palace in Rome.
• August 30 - Charles VIII becomes the new King of France upon the death of his father, King Louis XI.
• September 3 - The Princes in the Tower, uncrowned 12-year-old Edward V, recently deposed as King of England, is murdered in the Tower of London along with his 10-year-old brother, Richard of Shrewsbury, Duke of York, on the orders of their uncle, King Richard III.
• September 8 - Edward of Middleham, the 7-year-old son of King Richard III of England, is given the title of Prince of Wales and designated the heir apparent to the throne. However, Edward will die less than a year later on April 9.
• September 14 - Archduke Maximilian of Austria, father of the four-year old Philip the Handsome, Duke of the Burgundian Netherlands, declares the abolition of the Regency Council that had administered the land in Philip's name after the death of Mary of Burgundy on March 27, 1482; Maximilian becomes the sole regent.

  October–December

• October 10 - In England, a rebellion is started by Duke of Buckingham, against King Richard III. Fighting between the supporters of King Richard and of the late King Edward IV lasts for more than six weeks.
• October 29 - Battle of Una: Forces of the Kingdom of Croatia defeat the army of the Ottoman Empire.
• November 25 - Buckingham's rebellion comes to an end and most of the conspirators disperse to plan for another uprising.
• December 25 - At Rennes Cathedral in France, Henry Tudor, Earl of Richmond, leader of the House of Lancaster after Richard III of England of the House of York had seized the throne, pledges to marry Elizabeth of York, the eldest daughter the late King Edward IV, in order to strengthen his support for the overthrow of King Richard.
• December 27 - The Ashikaga shogunate shogunate and Koga kubo Ashikaga Shigeuji agree to the Tohiwaboku peace treaty, ending the Kyotoku War after almost 29 years. that had been ongoing since 1455.

  Date unknown

• Isaac Abravanel flees Portugal, after being implicated in a plot against the king.
• The Prince of Moscow builds the fortress of Ivangorod, facing Narva.
• Giovanni Bellini is named official painter of the Republic of Venice.
• Flavio Biondo publishes his Historiarum ab inclinatione romanorum imperii.