Tweede van een serie van 5 Oecumenische Concilies gehouden in het Lateranen [d:290] van 18 maart tot en met 6 april 1123. Hierbij een samenvatting van de belangrijkste Canons, door dit Concilie afgekondigd. (Aan een vertaling wordt gewerkt)

Canons van het Tweede Lateraans Concilie (4 - 16? apr 1139):

• Canon 2 [5935|2]
• Canon 4: Injunction to bishops and ecclesiastics not to scandalize anyone by the colours. the shape, or extravagance of their garments, but to clothe themselves in a modest and well-regulated manner.
• Canons 6, 7, 11: Condemnation and repression of marriage and concubinage among priests, deacons, subdeacons, monks, and nuns.
• Canon 10: Excommunication of laymen who fail to Pay the tithes due the bishops, or who do not surrender to the latter the churches of which they retain possession, whether received from bishops, or obtained from princes or other persons.
• Canon 12 fixes the periods and the duration of the Truce of God.
• Canon 13 [5935|13]
• Canon 14: Prohibition, under pain of deprivation of Christian burial, of jousts and tournaments which jeopardize life.
• (5935|17|Canon 17)
• Canon 20: Kings and princes are to dispense justice in consultation with the bishops.
• Canon 23 [5935|23]
• Canon 25: No one must accept a benefice at the hands of a layman.
• Canon 27: Nuns are prohibited from singing the Divine Office in the same choir with monks or canons.
• Canon 28: No church must be left vacant more than three years from the death of the bishop; anathema is pronounced against those (secular) canons who exclude from episcopal election "persons of piety" -- i. e. regular canons or monks.