Year 1457 (MCDLVII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.
February 11 – After years of captivity and absence from the Ming throne, the Zhengtong Emperor of China is reinstated as the Tianshun Emperor.
February 24 – Charles VIII of Sweden is declared deposed. Archbishop of Sweden Jöns Bengtsson Oxenstierna and statesman Erik Axelsson Tott become co-regents of Sweden. The throne is then offered to Christian I of Denmark and Norway.
April 12 – Ştefan cel Mare secures the throne of Moldavia, which he retains for the next 47 years.
June 23 – Christian I is elected king of Sweden, ending the war between Sweden and Denmark and restoring the Kalmar union.
August 14 – The Mainz Psalter, the second major book printed with movable type in the West, the first to be wholly finished mechanically (including colour) and the first to carry a printed date, is printed for the Elector of Mainz.
September 2 – Battle of Ujëbardha: One of Skanderbeg's most important victories against the Ottoman army in the open field.
Albrechts University is founded at Freiburg im Breisgau.
Edo Castle is built by Ōta Dōkan in modern-day Tokyo.
January 18 – Antonio Trivulzio, seniore, Roman Catholic cardinal (d. 1508)
January 28 – King Henry VII of England (d. 1509)
February 2 – Peter Martyr d'Anghiera, Italo-Spanish historian and diplomat (d. 1526)
February 13 – Mary of Burgundy, wife of Maximilian I, Holy Roman Emperor (d. 1482)
August 20 – Seongjong of Joseon, King of Joseon (d. 1494)
September 21 – Hedwig Jagiellon, Duchess of Bavaria, Polish princess (d. 1502)
November 16 – Beatrice of Naples, Hungarian Queen (d. 1508)
date unknown
Jacob Obrecht, Dutch composer (d. 1505)
Thomas Grey, 1st Marquess of Dorset (d. 1501)
George Nevill, Duke of Bedford (d. 1483)
probable
Sebastian Brant, German humanist and satirist (d. 1521)
Filippino Lippi, Florentine painter (d. 1504)
Thomas West, 8th Baron De La Warr (d. 1525)
March 14 – Jingtai Emperor of China (b. 1428)
March 16 – László Hunyadi, Hungarian statesman and warrior (b. 1433)
May 22 – Saint Rita of Cascia, Italian saint (b. 1381)
August 1 – Lorenzo Valla, Italian humanist
August 19 – Andrea del Castagno, Italian painter (b. 1421)
September 22 – Peter II, Duke of Brittany (b. 1418)
November 23 – King Ladislaus Posthumus of Bohemia and Hungary (b. 1440)
date unknown
Babur Ibn-Baysunkur, ruler of Khurasan (b. 1422)
1457 Wikipedia (Text) CC BY-SA