The Diocese of Thiruvalla was formed on 6 November 1933, and Rt. Rev. Jacob Mar Theophilos was enthroned as the first Bishop. From 29 November 1937 to 11 September 2003, Most Rev. Joseph Mar Severios, Most Rev. Zacharias Mar Athanasios, Most Rev. Isaac Mar Yoohanon, Most Rev. Geevarghese Mar Timotheos were enthroned respectively. Later the Hole See appointed His Grace Most Rev. Isaac Mar Cleemis as the sixth Bishop on October 2003. The Holy Episcopal Synod of the Malankara Catholic Church decided to elevate the Diocese of Thiruvalla to the status of Archdiocese on 15 May 2006. His Grace Most Rev. Dr. Isaac Mar Cleemis enthroned as the first Archbishop of Thiruvalla Archdiocese.

Heavenly Patrons: St. John and St. Theresa of Child Jesus

Archbishop: Most Rev. Thomas Mar Koorilos

Head Quarters:  Thiruvalla

Address: -

                        Catholic Bishop's House

Marygiri

                        Post Box  #4

                        Thiruvalla, Kerala, India

                        Tel.: +91-469-273 06 20, 270 13 19

                        Fax.: +91-469-270 08 22