1070s

The 1070s was a decade of the Julian Calendar which began on January 1, 1070, and ended on December 31, 1079.

Events

1070

1071

By place

Byzantine Empire
  • August 26Battle of Manzikert: The Byzantine army (35,000 men) under Emperor Romanos IV meets the Seljuk Turk forces of Sultan Alp Arslan near the town of Manzikert. Although the armies are initially evenly matched, as the Byzantines advance, the Seljuk Turks withdraw before them, launching hit-and-run attacks on the Byzantine flanks. While attempting to withdraw, the Byzantine army falls apart, either through treachery or confusion; the battle ends in a decisive defeat for the Byzantine Empire. Romanos is captured (though released by Alp Arslan within a week) and much of the elite Varangian Guard is destroyed; this will prove catastrophic for the Byzantine Empire.
  • October 24 – Romanos IV is deposed by John Doukas (Caesar) and his political advisor Michael Psellos after his return to Constantinople. Michael VII Doukas is crowned co-emperor and his mother Eudokia is forced to retire to a monastery.
Europe
England
Africa

1072

By place

Byzantine Empire
Europe
Britain
Seljuk Empire
China
  • Shen Kuo, Chinese polymathic scientist and statesman, is appointed as the head official for the Bureau of Astronomy – where he begins his work with the colleague Wei Pu on accurately plotting the orbital paths of the stars, planets, and moon three times a night for a continuum of five years.
  • Fall – Shen Kuo is sent to supervise Wang Anshi's program of surveying the buildup of silt deposits in the Grand Canal, outside the capital city of Kaifeng. Using an original technique, Shen successfully dredges the canal and demonstrates the formidable value of the silt gathered as a fertilizer.

By topic

Literature

1073

By place

Byzantine Empire
Europe
Britain
Asia

By topic

Religion

1074

By place

Byzantine Empire
Europe
Africa
China

By topic

Religion

1075

By place

Africa
Byzantine Empire
  • The future Emperor Alexios Komnenos captures the Norman rebel Roussel de Bailleul in Amaseia. Roussel had established a principality in eastern Anatolia in 1073 after rebelling against Emperor Michael VII Doukas, basing his power on his western mercenaries and local support in exchange for protection against invading Turkmen.[15]
Europe
England
Asia
  • Summer – Shen Kuo, Chinese polymath scientist and statesman, solves a border dispute with the Liao dynasty by dredging up old diplomatic records. He refutes Emperor Dao Zong's bluffs point for point during a meeting at Mt. Yongan (near modern-day Pingquan), reestablishing the rightful borders of the Song dynasty.
  • Vietnamese forces under General Lý Thường Kiệt defend Vietnam against a Chinese invasion.
  • The Liao dynasty version of the Buddhist Tripiṭaka is completed (approximate date).

By topic

Religion
  • February – Pope Gregory VII holds a council in the Lateran Palace at Rome. He publishes a decree against laymen investiture (an act which will later cause the Investiture Controversy).
  • April – The Dictatus papae (a compilation of 27 statements of powers) are included in the registry of Gregory VII, in which he asserts papal authority over earthly as well as spiritual rulers.
  • December 8 – Gregory VII writes a letter of reprimand to Henry IV. He accuses him of breaching his word and continued support of excommunicated councilors.
  • December 25 – Gregory VII is kidnapped in the church during Christmas night in Rome and briefly imprisoned by the Roman nobleman Cencio I Frangipane.

1076

By place

Europe
England
Africa
Asia

By topic

Literature
Religion
  • Demetrius Zvonimir donates the Benedictine monastery of St. Gregory in Vrana to Gregory VII.

1077

By place

Byzantine Empire
Europe
England
Seljuk Empire
Africa

By topic

Arts
Religion

1078

By place

Byzantine Empire
Europe
England
Africa
China

By topic

Religion

1079

By place

Europe
England
Seljuk Empire

By topic

Astronomy
  • Omar Khayyam, Persian mathematician and astronomer, calculates a 33 year calendar consisting of 25 ordinary years that include 365 days, and 8 leap years that include 366 days, the most accurate calculation of his time. Khayyam, in his Treatise on Demonstrations of Problems in Algebra, produces a complete classification of cubic equations and their geometric solutions (approximate date).
Religion

Significant people

Births

1070

1071

1072

1073

1074

1075

1076

1077

1078

1079

Deaths

1070

1071

1072

1073

1074

1075

1076

1077

1078

1079

References

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