Autonomous Bulgarian principality under nominal Ottoman suzerainty, created by the Congress of Berlin (1878) after the Russo-Turkish War; united with Eastern Rumelia in 1885, ruled by Alexander of Battenberg then Ferdinand of Saxe-Coburg-Gotha.
Ferdinand declared full independence and assumed the title of Tsar on 5 October 1908, becoming the Tsardom (Kingdom) of Bulgaria.
The atlas holds 2 border frames for Principality of Bulgaria — the shape you scrub through changes in 1878 · 1890.
Covers Balkan political history from 1878 onward, spanning Bulgaria's autonomous principality and its later communist republic.