May 21 – History, Events, Births, Deaths, Holidays and Observances On This Day

May 21 in History 293 – Roman Emperors Diocletian and Maximian appoint Galerius as Caesar to Diocletian, beginning the period of four rulers known as the Tetrarchy. 878 – Syracuse, Sicily, is captured by the Muslim Aghlabids after a nine-month siege. 879 – Pope John VIII gives blessings to Branimir of Croatia and to the Croatian people, considered to be international recognition…

May 20 – History, Events, Births, Deaths, Holidays and Observances On This Day

May 20 in History 325 – The First Council of Nicaea is formally opened, starting the first ecumenical council of the Christian Church. 491 – Empress Ariadne marries Anastasius I. The widowed Augusta is able to choose her successor for the Byzantine throne, after Zeno (late emperor) dies of dysentery. 685 – The Battle of Dun Nechtain is…

May 17 – History, Events, Births, Deaths, Holidays and Observances On This Day

May 17 in History 1395 – Battle of Rovine: The Wallachians defeat an invading Ottoman army. 1536 – George Boleyn, 2nd Viscount Rochford and four other men are executed for treason. 1536 – Henry VIII and Anne Boleyn’s marriage is annulled. 1590 – Anne of Denmark is crowned Queen of Scotland. 1642 – Paul de Chomedey, Sieur de Maisonneuve (1612–1676)…

May 16 – History, Events, Births, Deaths, Holidays and Observances On This Day

May 16 in History 946 – Emperor Suzaku abdicates the throne in favor of his brother Murakami who becomes the 62nd emperor of Japan. 1204 – Having been elected on May 9, Baldwin IX, Count of Flanders is crowned as the first Emperor of the Latin Empire. 1426 – Gov. Thado of Mohnyin becomes king of Ava. 1527 –…

May 12 – History, Events, Births, Deaths, Holidays and Observances On This Day

May 12 in History 254 – Pope Stephen I succeeds Pope Lucius I, becoming the 23rd pope of the Catholic Church. 907 – Zhu Wen forces Emperor Ai into abdicating, ending the Tang dynasty after nearly three hundred years of rule. 1191 – Richard I of England marries Berengaria of Navarre in Cyprus; she is crowned Queen consort of England the same day. 1328 – Antipope…

May 9 – History, Events, Births, Deaths, Holidays and Observances On This Day

May 9 in History 1009 – Lombard Revolt: Lombard forces led by Melus revolt in Bari against the Byzantine Catepanate of Italy. 1271 – Ninth Crusade, Edward I of England disembarks at Acre. 1386 – England and Portugal formally ratify their alliance with the signing of the Treaty of Windsor, making it the oldest diplomatic alliance in the world which…

May 1 – History, Events, Births, Deaths, Holidays and Observances On This Day

May 1 in History 475 BC – Roman consul Publius Valerius Poplicola celebrates a Roman triumph for his victory over Veii and the Sabines. 305 – Diocletian and Maximian retire from the office of Roman emperor. 524 – King Sigismund of Burgundy is executed at Orléans after an eight-year reign and is succeeded by his brother Godomar. 880 – The Nea Ekklesia is inaugurated in Constantinople, setting…