300?: Established as Archdiocese of Constantia antea Tomi (latine) / Costanza di Scizia (Italiano)
600?: Suppressed
1890?: Restored as Titular Archiepiscopal See of Constantia antea Tomi (latine) / Costanza di Scizia (Italiano)
1925: Renamed as Titular Archiepiscopal See of Constantia (latine) / Costanza di Scizia (Italiano)
1926: Demoted as Titular Episcopal See of Constantia (latine) / Costanza di Scizia (Italiano)
1929: Promoted as Titular Archiepiscopal See of Constantia (latine) / Costanza di Scizia (Italiano) / Tomi (latine)
1933: Renamed as Titular Archiepiscopal See of Tomi (latine) / Costanza di Scizia (Italiano) / Tomi (Italiano)
1990: Renamed as Titular Archiepiscopal See of Constantia in Scythia (latine) / Costanza di Scizia (Italiano) / Tomi (Italiano) / Custendje / Constantien(sis) in Scythia (Latin) / Tomitan(us) (Latin)