Old clock in sand with the words: It Happend in April

Browse Historical Events by Month: What Happened in April?

Explore key moments from April in U.S. and world history — organized by year. Dates for earlier events may be approximate.

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800 CE, April 25

Charlemagne is crowned Emperor of the Holy Roman Empire by Pope Leo III in Rome.

870 CE, April 23

The Viking invasion of England under the leadership of Ivar the Boneless results in the capture of Dumbarton.

878 CE, April 12

The Battle of Cynwit takes place between the Wessex Saxons and the Vikings.

891 CE, April 20

The Irish Viking fleet is defeated by the Franks at the Battle of Leuven in present-day Belgium.

909 CE, April

The city of Toledo in Spain falls to the forces of the Emir Abd-ar-Rahman III, establishing Umayyad control.

919 CE, April

The Saxon king Henry the Fowler is elected King of the Germans.

924 CE, April

King Edward the Elder of England dies, succeeded by his son Athelstan.

933 CE, April

Battle of Riade: Henry I of Germany defeats a Hungarian invasion.

944 CE, April

Edmund I succeeds his brother Athelstan as King of England.

955 CE, April 12

The Battle of Lechfeld: Otto I defeats the Magyars, ending their raids in Europe.

972 CE, April

Edgar the Peaceful is crowned King of England.

987 CE, April 3

Hugh Capet is crowned King of France, initiating the Capetian dynasty.

995 CE, April 23

The Norwegian King Olaf Tryggvason is defeated in the Battle of Svolder.

999 CE, April 4

Brian Boru, High King of Ireland, wins the Battle of Glenmama, consolidating his power.

1002 CE, April 23

St. Brice's Day massacre in England: King Æthelred the Unready orders the killing of Danish settlers.

1009 CE, April 17

The Church of the Holy Sepulchre in Jerusalem is destroyed by the Fatimid caliph Al-Hakim bi-Amr Allah.

1014 CE, April 23

The Battle of Clontarf takes place at Clontarf, near Dublin, Ireland. between an army led by Brian Boru, High King of Ireland, against a Norse-Irish alliance comprising the forces of Sigtrygg Silkbeard, King of Dublin; Máel Mórda mac Murchada, King of Leinster; and a Viking army from abroad led by Sigurd of Orkney and Brodir of Mann. The battle It lasted from sunrise to sunset, and ended in a rout of the Viking and Leinster armies. More

1016 CE, April 23

Edmund Ironside succeeds his father Æthelred the Unready as king of England.

1028 CE, April 20

Henry III, also known as Henry the Black is crowned King of Germany in the Cathedral of Aachen by Pilgrim, Archbishop of Cologne. Upon the death of his father on 4 June 1039 he became sole ruler of the kingdom and was crowned Holy Roman Emperor by Pope Clement II in Rome in 1046. More

1034 CE, April 19

Mieszko II Lambert is crowned King of Poland.

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