Dobruja is the territory between the Lower Danube in the west, the Danube Delta in the north and the Black Sea in the east, which became part of the Romanian independent state in 1878. Thus, the province between the Danube and the Black Sea, which had a multi-ethnic population, made up of Romanians, Turks, Tatars, Bulgarians, Germans, Roma and Jews, united with Romania. After 35 years, in 1913, through the Treaty of Bucharest signed after the Second Balkan War, the territory of Dobruja expanded with the Cadrilater, or Southern Dobrogea.
Starting 1878, Dobruja developed at a fast pace. The construction of the Sulina navigable channel, the exit to the Black Sea, the construction of the Constanța Port and the Cernavodă Bridge turned Dobruja from a backward province into a prosperous, developed one. Also, the presence of the Romanian Royal House in this area was very important and would contribute a great deal to what the province became in the following decades.