Kyprianos or Cyprian (Koutsoumpas) (Greek: Κυπριανός (Κουτσούμπας); 1935 – May 30, 2013) was an Old Calendarist, and metropolitan of Oropos and Fyli and President of the Holy Synod of the Orthodox Church of Greece - Holy Synod in Resistance.
[citation needed] Koutsoumpas was tonsured with the name Kyprianos (Cyprian) in the Monastery of Saint John the Theologian on the island of Patmos.
[citation needed] In his book, How I Learned About the Patristic Calendar and How I Returned to It, Kyprianos stated he initially hesitated to join the Greek Old Calendarists due to the sectarianism and extremism of some of its members.
[citation needed] On January 3/16, 1969, with the blessing of his spiritual father, Elder Philotheos (Zervakos) of Paros, Kyprianos and his monastery joined the Church of the Genuine Orthodox Christians of Greece, a Greek Old Calendarists denomination.
[citation needed] Koutsoumpas is an author of books and articles on E. Orthodox theology and spirituality, many of which have been translated to different languages.