Year 1452 (MCDLII) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar.
February 22 – Homicide of William Douglas, 8th Earl of Douglas by James II of Scotland at Stirling Castle.
March 17 – Reconquista: The combined forces of the Kingdom of Castile and its subsidiary kingdom of Murcia defeat the Emirate of Granada at the Battle of Los Alporchones around the city of Lorca in Murcia.
March 19 – Frederick III, Holy Roman Emperor becomes the last to be crowned in Rome.
May 31 – Revolt of Ghent: Philip the Good, Duke of Burgundy, officially declares war on Ghent.
June 18 – Pope Nicholas V issues the bull Dum Diversas, legitimising the colonial slave trade.
October
English troops under John Talbot, 1st Earl of Shrewsbury, land in Guyenne, France, and retake most of the province without a fight.
Byzantine–Ottoman Wars: The Ottoman governor of Thessaly, Turakhan Beg, breaks through the Hexamilion wall for the fourth time and ravages the Peloponnese peninsula to prevent the Byzantine Despotate of the Morea from assisting Constantinople during the final Ottoman siege of the imperial capital.
A major eruption of the South Pacific volcano Kuwae in Vanuatu has a subsequent global cooling effect (the eruption released more sulfate than any other event in the past 700 years).
Portuguese navigator Diogo de Teive discovers the islands of Corvo and Flores in the Azores.
Battle of Bealach nam Broig, a Scottish clan battle.
February 6 – Joanna, Princess of Portugal (d. 1490)
February 14 – Pandolfo Petrucci, tyrant of Siena (d. 1512)
March 10 – King Ferdinand II of Aragon (d. 1516)
April 15 – Leonardo da Vinci, Italian artist and inventor (d. 1519)
April 19 – King Frederick IV of Naples (d. 1504)
May 18 – Henry the Younger of Poděbrady, Bohemian nobleman (d. 1492)
July 27
Lucrezia Crivelli, mistress of Ludovico Sforza (d. 1508)
Ludovico Sforza, Duke of Milan (d. 1508)
August 12 – Abraham Zacuto, Jewish astronomer, astrologer, mathematician, rabbi and historian (d. 1515)
September 21 – Girolamo Savonarola, Italian religious reformer, ruler of Florence (d. 1498)
October 2 – King Richard III of England (d. 1485)
December 6 – Antonio Mancinelli, Humanist pedagogue and grammarian (d. 1505)
December 10 – Johannes Stöffler, German mathematician (d. 1531)
Diogo Cão, Portuguese explorer (d. 1486)
February 10
Švitrigaila, Grand Prince of Lithuania
Michał Bolesław Zygmuntowicz (Michael Žygimantaitis), Prince of Black Ruthenia
February 14 – Konrad VII the White, Duke of Oleśnica
February 22 – William Douglas, 8th Earl of Douglas (assassinated)
May 26 – John Stafford, Archbishop of Canterbury
October – Nicholas Close, English bishop
December 12 – Guillaume-Hugues d'Estaing, Catholic cardinal
probable – Gemistus Pletho, philosopher
1452 Wikipedia (Text) CC BY-SA