 After the Coonan Cross Oath of 1653, a delegate of the Syriac Orthodox Patriarch of Antioch, Mar Gregorios Abdal Jaleel a Bishop of Jerusalem, arrived in Malankara.In 1665 he regularized the consecration of Mar Thoma I as the first Metropolitan Bishop of Malankara.At first during his reign Mar Thoma I was assisted by Ankamaly Vengoor Gevarghese Kathanar, Kadavil Chandy Kathanar, Palliveetil Chandy Kathanar, and Anjimootil Itty Thoman Kathanar, who lead the Coonan Cross Oath in 1653.