Columbia subject headings:
Harvard subject headings:
Constantinople (Ecumenical patriarchate). Metropolis Chalkēdonos--Seal.
Constantinople (Ecumenical patriarchate). Mētropolis Derkōn--Seal.
Religious institutions--Seals.
Seals (Numismatics)--Turkey--Istanbul.
Princeton subject headings:
Constantinople (Ecumenical patriarchate). Metropolis Chalkēdonos--Seal.
Constantinople (Ecumenical patriarchate). Mētropolis Derkōn--Seal.
Religious institutions--Seals.
Seals (Numismatics)--Turkey--Istanbul.