Europe · The modern states
Principality of Bulgaria
1878–1946
An autonomous Principality of Bulgaria was created by the Treaty of San Stefano (March 1878) and then drastically reduced by the Treaty of Berlin (July 1878), which split the Bulgarian lands and created a separate autonomous province of Eastern Rumelia — a truncation Bulgarian nationalism sought to reverse ("San Stefano Bulgaria" became the national ideal). Bulgaria absorbed Eastern Rumelia in 1885.
- Existed
- 1878–1946
- Shown on the map
- 1880–1944
- Peak area
- 170k km²
- Region
- Europe
Overview
An autonomous Principality of Bulgaria was created by the Treaty of San Stefano (March 1878) and then drastically reduced by the Treaty of Berlin (July 1878), which split the Bulgarian lands and created a separate autonomous province of Eastern Rumelia — a truncation Bulgarian nationalism sought to reverse ("San Stefano Bulgaria" became the national ideal). Bulgaria absorbed Eastern Rumelia in 1885. In 1908 Prince Ferdinand of Saxe-Coburg-Gotha declared full independence and assumed the title Tsar, founding the Tsardom.
Decline and legacy
Bulgaria was the great loser of the Balkan Wars: victorious in the First (1912–13), it was defeated in the Second (1913) after attacking its former allies. It joined the Central Powers in World War I, was defeated, and by the Treaty of Neuilly (1919) lost territory and access to the Aegean. Under Tsar Boris III the country drifted into royal authoritarianism in the 1930s and allied with the Axis in 1941, regaining Macedonian and Thracian lands. Notably, Bulgaria — under domestic pressure from the Orthodox Church, parliamentarians and public figures — refused to deport its roughly 48,000 Jews from the pre-1941 territory, though it did deport over 11,000 Jews from the newly occupied territories of Macedonia and Thrace to their deaths. Boris died suddenly in 1943; a Soviet invasion in September 1944 brought a communist-led Fatherland Front to power, and a 1946 referendum abolished the monarchy.
Common questions
- What was the Principality of Bulgaria?
- An autonomous Principality of Bulgaria was created by the Treaty of San Stefano (March 1878) and then drastically reduced by the Treaty of Berlin (July 1878), which split the Bulgarian lands and created a separate autonomous province of Eastern Rumelia — a truncation Bulgarian nationalism sought to reverse ("San Stefano Bulgaria" became the national ideal). Bulgaria absorbed Eastern Rumelia in 1885.
- When did the Principality of Bulgaria exist?
- The Principality of Bulgaria existed 1878–1946. On this map it is drawn 1880–1944.
- How large was the Principality of Bulgaria?
- At its greatest extent drawn on this map, the Principality of Bulgaria covered about 170,000 km². That is the largest area the border data gives it across the years it is drawn, not necessarily its greatest extent in history.
- How did the Principality of Bulgaria end?
- Bulgaria was the great loser of the Balkan Wars: victorious in the First (1912–13), it was defeated in the Second (1913) after attacking its former allies. It joined the Central Powers in World War I, was defeated, and by the Treaty of Neuilly (1919) lost territory and access to the Aegean.
Sources
This compendium cites its sources once for the whole document rather than per territory. Its bibliography names the English Wikipedia articles for each state as the primary basis, cross-checked against Encyclopædia Britannica, the United States Holocaust Memorial Museum, the ICTY and the 2004 Wiesel Commission for genocide and atrocity figures, and current news reporting (Reuters, AP, BBC, and others) for 2025–2026 political developments, which should be verified against live sources. The article this entry is anchored on:
- Wikipedia — Principality of Bulgaria en.wikipedia.org/wiki/Principality_of_Bulgaria
This entry was last updated .
This entry was researched and drafted with AI from the sources above, and has not been reviewed by a historian. How entries are made
Text available under CC BY-SA 4.0: reuse it with a credit to The World Through Time and a link to this page. Passages drawing on the Wikipedia articles listed above are also licensed CC BY-SA 4.0 by their contributors.
Border geometry for the map itself comes from Cliopatria v0.12 (Seshat Global History Databank, CC-BY-4.0).
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