Title: Hai Mētropoleis Chalkēdonos, Derkōn, kai Prinkēponnēsōn, Oikoumenikon Patriarcheion
Subjects: Constantinople (Ecumenical patriarchate), Constantinople (Ecumenical patriarchate). Mētropolis Chalkēdonos, Constantinople (Ecumenical patriarchate). Mētropolis Derkōn, History