Church historian Sozomen noted that in the IV century, these territories were part of a single diocese, which was governed by the Bishop of Tomis.
For this purpose, the Roman Emperor Theodosius I the Great (379–395) placed three dioceses on the Black Sea coast between the Crimea and modern-day Varna (Bulgaria) under the jurisdiction of the Tomis see.
In 536, the diocese of Tomis was reorganized into a Metropolitan area and 14 subordinate Episcopal sees were established within the borders of Scythia Minor.
[1] In this situation, the entry of Dobrudja under the canonical jurisdiction of the Lower Danube Diocese (with a seat in Galaţi[1]) on March 16, 1879, fulfilled the religious aspirations of the Romanians Dobrogea.
[2] In 1923 the Diocese of Constantia (Tomis) was created, which included the counties of the southern part of Dobruja: Constanţa, Ialomița, Durostor and Caliacra.