Mar Addai II (Syriac: ܡܪܝ ܐܕܝ), born Shlemun Giwargis, (born in Iraq on 1 August 1950, although some sources cite 1946 or 1948) is the incumbent Catholicos Patriarch of the Ancient Church of the East and resides in the Apostolic See of Seleucia-Ctesiphon in Baghdad, Iraq.