DOBRUDJA (Bulgarian Dobritch, Rumanian Dobrogea)  , also written DOBRUDSCHA, and DoBRUJA, a region of south-eastern Europe, bounded on the north and west by the Danube, on the east by the Black Sea, and on the south by Bulgaria . . Pop . (1900) 267,808; area, 6000 sq. m . The strategic importance of this territory was recognized by the Romans, who defended it on the south by " Trajan's Wall," a double rampart, drawn from Constantza, on the Black Sea, to the Danube . In later times. it was utilized by Russians and Turks, as in the wars of 1828, ;'854 and 1878, when it was finally wrested from Turkey . By the treaty of Berlin, in 1878, the Russians rewarded their Rumanian allies with this land of mountains, fens and barren steppes, peopled by Turks, Bulgarians, Tatars, Jews and other aliens; while, to add to the indignation of Rumania, they annexed instead the fertile country of Bessarabia, largely inhabited by Rumans . After 188o, however, the steady decrease of aliens, and,the development of the Black Sea ports, rendered the Dobrudja a source of prosperity to Rumania .