The Syro-Malabar Catholic Church is one of the 22 Eastern (Oriental) Catholic Churches in full communion with Rome. It is the second largest Eastern Catholic Church after the Ukrainian Church and the largest of the Saint Thomas Christian (Nazrani) denominations with 4.6 million believers. It is a sui juris Church governed by the Synod of Bishops headed by the Major Archbishop. The Syro-Malabar Church, with its deep-rooted spirituality and high rate of vocations to priesthood and religious life, can be considered as the most vibrant Catholic community in the world.