Archbishop Karekin I Khachadourian (in Armenian Գարեգին Ա Խաչատուրյան) (6 November 1880, Trebizond – 22 July 1961, Istanbul) was the 81st Armenian Patriarch of Constantinople under the authority of the Catholicos of Armenia and of all Armenians.
He was born Khachik Khachadourian in Trabzon, taking the name Karekin on ordination.
He assumed his duties as Patriarch on 16 March 1951, after he returned from serving in Argentina.
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