On This Day

Battle of Cassel; Robert I the Frisian defeats Arnulf III/I

Robert I (1035 – 13 October 1093), known as Robert the Frisian, was count of Flanders from 1071 until his death in 1093.

Robert I (1035 – 13 October 1093), known as Robert the Frisian, was count of Flanders from 1071 until his death in 1093. He was a son of Count Baldwin V out of his first marriage, He was the older brother of Count Baldwin VI and claimed the countship after defeating his nephew Arnulf III and his allies, which included King Philip I of France, Count Eustace II of Boulogne and the counts of Saint-Pol and Ardres at the Battle of Cassel. He subsequently made peace with Philip, who became his stepson-in-law, but remained hostile to his sister Matilda and her husband William the Conqueror, who was king of England and duke of Normandy.

Historical Significance

Robert I (1035 – 13 October 1093), known as Robert the Frisian, was count of Flanders from 1071 until his death in 1093.

Events Before

  1. Battle of Stamford Bridge: English army under King Harold II defeats invading Norwegians led by King Harald Hardrada and

    Battle of Stamford Bridge: English army under King Harold II defeats invading Norwegians led by King Harald Hardrada and Harold's brother Tostig, who are both killed

  2. William the Conqueror's troops set sail from Normandy to invade England

    William the Conqueror (1028 – 9 September 1087), sometimes called William the Bastard, was the first Norman king of England (as William I), reigning from 1066 until his death.

  3. Baldwin VI becomes Count of Flanders

    Baldwin VI becomes Count of Flanders

  4. Roquefort cheese created in a cave near Roquefort, France

    Roquefort cheese created in a cave near Roquefort, France

  5. Arnulf III the Hapless becomes Earl of Flanders

    Arnulf III the Hapless becomes Earl of Flanders

Events After

  1. Robert Guiscard's Norman force conquers Palermo

    The Siege of Palermo was carried out by the Normans under the command of Robert Guiscard and Roger of Hauteville against the Muslim-held city of Palermo.

  2. Former Byzantine Emperor Romanos IV Diogenes blinded by rivals and exiled

    Romanos IV Diogenes was Byzantine emperor from 1068 to 1071. Determined to halt the decline of the Byzantine military and to stop Turkish incursions into the empire, he is nevertheless best known for...

  3. Pope Alexander II buried and Cardinal Hildebrand is chosen as Pope Gregory VII

    Pope Alexander II buried and Cardinal Hildebrand is chosen as Pope Gregory VII

  4. Battle of Montesarchio: Prince of Benevento, Pandulf IV killed battling the encroaching Normans in southern Italy

    Battle of Montesarchio: Prince of Benevento, Pandulf IV killed battling the encroaching Normans in southern Italy

  5. Dmitar Zvonimir is crowned king of Croatia

    Demetrius Zvonimir (Croatian: Dmitar Zvonimir, pronounced [dmîtar zʋônimiːr]; Old Church Slavic: ⰸⱏⰲⱏⱀⰻⰿⰻⱃⱏ; died 1089) was a King of Croatia and Dalmatia from 1075 or 1076 until his death in 1089.

More from the 1070s

Frequently Asked Questions

What happened on February 22, 1071?
Robert I (1035 – 13 October 1093), known as Robert the Frisian, was count of Flanders from 1071 until his death in 1093. He was a son of Count Baldwin V out of his first marriage, He was the older brother of Count Baldwin VI and claimed the countship after defeating his nephew Arnulf III and his allies, which included King Philip I of France, Count Eustace II of Boulogne and the counts of Saint-Pol and Ardres at the Battle of Cassel. He subsequently made peace with Philip, who became his stepson-in-law, but remained hostile to his sister Matilda and her husband William the Conqueror, who was king of England and duke of Normandy.
Why is Battle of Cassel; Robert I the Frisian defeats Arnulf III/I significant?
Robert I (1035 – 13 October 1093), known as Robert the Frisian, was count of Flanders from 1071 until his death in 1093.

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