site.btaDecember 21, 1952: Sub-Balkan Railway Line Unveiled
People gathered at Mirkovo station for the opening of the sub-Balkan railway line, December 21, 1952 (BTA Archive Photo/Racho Stoyanov)
On December 21, 1952, the sub-Balkan Railway line was unveiled in Bulgaria, connecting the capital with the coastal city of Burgas.
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