Holy See of the East the Church of the East after the Coonan Cross Oath and joined the Church of Antioch also claims the title of the Holy See of the East, since St. Thomas is also the founder of this churches. The Malankara Orthodox Syrian Church which evolved out of the Malankara Church as a part of the Oriental Orthodox Churches claims the title of the Catholicos of the East and the Holy Apostolic See of St. Thomas. The Malankara Syrian Catholic Church which evolved from the Malankara Church as a part of the Eastern Catholic Church in full communion with the Holy See
Comprehensive Agreement between the Holy See and the State of Palestine special nature not defined as "diplomatic" were established between the Holy See and PLO on Oct. 26, 1994. Holy See-Palestinian negotiations have produced a basic agreement signed on Feb. 15, 2000, which committed the PLO to respect freedom of religion in general, as well as freedom of action for Catholic communities and establishments under Palestinian control. The need for a more comprehensive agreement led to the conclusion of such an agreement on June 26, 2015. The agreement went into effect on Jan. 2, 2016. The Comprehensive Agreement between the Holy See and the State of Palestine consists of 32 articles