Quilon is the first Indian diocese erected by Pope John XXII, and Jordanus is appointed the first bishop

The Diocese of Quilon is a Latin Church diocese of the Catholic Church based in the southern Indian city of Kollam. The diocese was create in 1329 but the Bishop did not take canonical possession and then Gregory XVI made Quilon as the new diocese suffragan of Verapoly on September 1, 1886. Then diocese was made as a suffragan in the ecclesiastical province of the metropolitan Archdiocese of Trivandrum. The Diocese of Quilon covers an area of 1,950 km2 (753 square miles) that contains a population of some 4.8 million. At least 4.8% of the people in the area are Catholic. The history of the Roman Catholic Church in Quilon begins with the erection of a diocese on 9 August 1329. This diocese was later suppressed.