Continent: East Europe
Rite: Roman (Latin)
Type: Titular Archiepiscopal See
Name: Constantia in Scythia (latine) / Costanza di Scizia (Italiano) / Tomi (Italiano) / Custendje / Constantien(sis) in Scythia (Latin) / Tomitan(us) (Latin)
Location: Costanza, Custendje, pr. Scizia, Romania
- 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)