Church Document
First Council of the Lateran
Ecumenical Council · 1123
The ninth ecumenical council (1123), the first held in the West, confirmed the Concordat of Worms that ended the Investiture Controversy and enacted reforms on simony and clerical discipline.
Key themes
- Investiture Controversy
- Concordat of Worms
- Church reform
Document type
Council document
Issuing authority
Catholic Church
Issued date
1123