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 19 in History 639 – Ashina Jiesheshuai and his tribesmen assaulted Emperor Taizong at Jiucheng Palace. 715 – Pope Gregory II is elected. 1051 – Henry I of France marries the Russian princess, Anne of Kiev. 1445 – John II of Castile defeats the Infantes of Aragon at the First Battle of Olmedo. 1499 – Catherine of Aragon is married…
May 15 in History 495 BC – A newly constructed temple in honour of the god Mercury was dedicated in ancient Rome on the Circus Maximus, between the Aventine and Palatine hills. To spite the senate and the consuls, the people awarded the dedication to a senior military officer, Marcus Laetorius. 221 – Liu…
This day marks the approximate midpoint of spring in the Northern Hemisphere and of autumn in the Southern Hemisphere (starting the season at the March equinox). May 5 in History 553 – The Second Council of Constantinople begins 1215 – Rebel barons renounce…
April 14 in History 43 BC – Battle of Forum Gallorum: Mark Antony, besieging Caesar’s assassin Decimus Brutus in Mutina, defeats the forces of the consul Pansa, but is then immediately defeated by the army of the other consul, Aulus Hirtius. AD 69 – Vitellius, commander of the Rhine armies, defeats Emperor Otho in the Battle of…
April 12 in History 240 – Shapur I becomes co-emperor of the Sasanian Empire with his father Ardashir I. 467 – Anthemius is elevated to Emperor of the Western Roman Empire. 627 – King Edwin of Northumbria is converted to Christianity by Paulinus, bishop of York. 1012 – Duke Oldřich of Bohemia deposes and blinds his brother Jaromír who flees…
April 11 in History 491 – Flavius Anastasius becomes Byzantine emperor, with the name of Anastasius I. 1241 – Batu Khan defeats Béla IV of Hungary at the Battle of Mohi. 1512 – War of the League of Cambrai: French forces led by Gaston de Foix win the Battle of Ravenna.…
April 9 in History 190 – Dong Zhuo has his troops evacuate the capital Luoyang and burn it to the ground. 475 – Byzantine Emperor Basiliscus issues a circular letter (Enkyklikon) to the bishops of his empire, supporting the Monophysite Christological position. 537 – Siege of Rome: The Byzantine general Belisarius receives his…
April 5 in History 823 – Lothair I is crowned King of Italy by Pope Paschal I. 919 – The second Fatimid invasion of Egypt begins, when the Fatimid heir-apparent, al-Qa’im bi-Amr Allah, sets out from Raqqada at the head of his army. 1081 – Alexios I Komnenos is crowned Byzantine emperor at Constantinople, bringing the Komnenian dynasty to full power.…
On the Roman calendar, this was known as the day before the nones of April (Latin: Prid. Non. Apr.). April 4 in History 503 BC – Roman consul Agrippa Menenius Lanatus celebrates a triumph for a military victory over the Sabines. 1147 – Moscow is mentioned for the first time in the historical record, when…