On This Day
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First Council of the Lateran (9th ecumenical council) opens in Rome, agreements of the Concordat of Worms are ratified

The First Council of the Lateran was the 9th ecumenical council recognised by the Catholic Church.

The First Council of the Lateran was the 9th ecumenical council recognised by the Catholic Church. The first ecumenical council to be held in Western Europe and the first since the Great Schism of 1054, it was convoked by Pope Callixtus II in December 1122, immediately after the Concordat of Worms. The council sought to bring an end to the practice of the conferring of ecclesiastical benefices by people who were laymen, free the election of bishops and abbots from secular influence, clarify the separation of spiritual and temporal affairs, re-establish the principle that spiritual authority resides solely in the Church and abolish the claim of the Holy Roman Emperor to influence papal elections.

The council was significant in size: 300 bishops and more than 600 abbots assembled at Rome's…

Historical Significance

The First Council of the Lateran was the 9th ecumenical council recognised by the Catholic Church.

Events Before

  1. English King Henry I marries 2nd wife Adeliza [Adela] of Louvain at Windsor Castle

    English King Henry I marries 2nd wife Adeliza [Adela] of Louvain at Windsor Castle

  2. Battle of Didgori: Georgian army under King David the Builder wins a decisive victory over the renowned Seljuk commander

    Battle of Didgori: Georgian army under King David the Builder wins a decisive victory over the renowned Seljuk commander Ilghazi

  3. Dirk VI becomes count of Holland

    Dirk VI (1114 – 5 August 1157) was Count of Holland between 1121 and 1157, at first, during his minority, under the regency of his mother Petronilla. He was the son of Count Floris II.

  4. Norbert of Xanten, later St. Norbert, founds the Premonstratensian Order at Prémontré in northern France

    Norbert of Xanten, later St. Norbert, founds the Premonstratensian Order at Prémontré in northern France

  5. Concordat of Worms is agreed between Pope Calixtus II and Holy Roman Emperor Henry V

    Henry V (German: Heinrich V.; probably 11 August 1081 or 1086 – 23 May 1125) was King of Germany (from 1099 to 1125) and Holy Roman Emperor (from 1111 to 1125), as the fourth and last ruler of the...

Events After

  1. David I becomes King of Scots

    David I or Dauíd mac Maíl Choluim (Modern Gaelic: Daibhidh I mac [Mhaoil] Chaluim; c. 1084 – 24 May 1153) was a 12th century ruler and saint who was Prince of the Cumbrians from 1113 to 1124 and King...

  2. Tyrus surrenders to Crusaders

    Tyrus surrenders to Crusaders

  3. Orval abbey church consecrated in southeast Belgium

    Orval abbey church consecrated in southeast Belgium

  4. Theobald Buccapecus elected Pope Coelestinus II (he refuses)

    Theobald Buccapecus elected Pope Coelestinus II (he refuses)

  5. Chancellor Haimeric selects pope (Lamberto becomes Honorius II)

    Chancellor Haimeric selects pope (Lamberto becomes Honorius II)

More from the 1120s

English King Henry I marries 2nd wife Adeliza [Adela] of Louvain at Windsor Castle

English King Henry I marries 2nd wife Adeliza [Adela] of Louvain at Windsor Castle

Fulco V's son Godfried marries King Henry I's daughter Mathildis

Fulco V's son Godfried marries King Henry I's daughter Mathildis

Battle of Didgori: Georgian army under King David the Builder wins a decisive victory over the renowned Seljuk commander

Battle of Didgori: Georgian army under King David the Builder wins a decisive victory over the renowned Seljuk commander Ilghazi

Concordat of Worms is agreed between Pope Calixtus II and Holy Roman Emperor Henry V

Henry V (German: Heinrich V.; probably 11 August 1081 or 1086 – 23 May 1125) was King of Germany (from 1099 to 1125) and Holy Roman Emperor (from 1111 to 1125), as the fourth and last ruler of the...

Frequently Asked Questions

What happened on March 18, 1123?
The First Council of the Lateran was the 9th ecumenical council recognised by the Catholic Church. The first ecumenical council to be held in Western Europe and the first since the Great Schism of 1054, it was convoked by Pope Callixtus II in December 1122, immediately after the Concordat of Worms. The council sought to bring an end to the practice of the conferring of ecclesiastical benefices by people who were laymen, free the election of bishops and abbots from secular influence, clarify the separation of spiritual and temporal affairs, re-establish the principle that spiritual authority resides solely in the Church and abolish the claim of the Holy Roman Emperor to influence papal elections.
Why is First Council of the Lateran (9th ecumenical council) opens in Rome, agreemen... significant?
The First Council of the Lateran was the 9th ecumenical council recognised by the Catholic Church.

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March 18 in HistoryYear 1123