The Bulgarian Catholic Apostolic Vicariate of Constantinople (informally Constantinople of the Bulgarians) was the first missionary, pre-diocesan jurisdiction of the Bulgarian Catholic Church sui iuris (Eastern Catholic, Byzantine Rite in Bulgarian language).
As Apostolic Vicariate it was exempt, i.e. directly dependent on the Holy See, and entitled to a titular bishop. (No incumbents available)
History
It was established in 1861 as Bulgarian Catholic Apostolic Vicariate of Constantinople, with seat in the capital of and on part of the Balkanic territory of the crumbling Ottoman empire (present European Turkey, Bulgaria and Greece).
On 1883.04.07, it lost Turkish Thrace as territory to establish the Bulgarian Catholic Apostolic Vicariate of Tracia and on 1883.06.12 its Greek territory to establish the Bulgarian Catholic Apostolic Vicariate of Macedonia, which covered Macedonia and Greece.
In 1926 it was suppressed and its remaining (Bulgarian) territory reassigned to establish the Bulgarian Catholic Apostolic Exarchate of Sofia, which remained as the particular church's last and only jurisdiction, absorbing both Constantinople's above daughter vicariates, Tracia and Macedonia.