What is Kingdom of Bulgaria?
{{Infobox former country | native_name = {{native name|bg|Царство България}}<br>{{small|''Tsarstvo Balgariya''}} | year_leader3 = 1943–1946 | legislature = [[National Assembly of Bulgaria|National Assembly]] | year_deputy2 = 1944–1946 <small>(last)</small> | deputy2 = [[Kimon Georgiev]] | year_deputy1 = 1908–1911 <small>(first)</small> | deputy1 = {{nowrap|[[Aleksandar Malinov]]}} | title_deputy = [[List of Prime Ministers of Bulgaria|Chairman of the Council of Ministers]] | leader3 = [[Simeon II of Bulgaria|Simeon II]] | year_leader2 = 1918–1943 | leader2 = [[Boris III of Bulgaria|Boris III]] | year_leader1 = 1908–1918 | leader1 = [[Ferdinand of Bulgaria|Ferdinand ]] | title_leader = [[List of Bulgarian monarchs|Tsar]] (King) | religion = [[Eastern Orthodox Church|Orthodox Christianity]] ([[state religion|established religion]]) | government_type = {{plainlist| *[[Unitary state|Unitary]] [[parliamentary]] [[constitutional monarchy]]<br>{{nowrap|<small>(1908–1934; 1943–1944)</small>}} *[[Unitary state|Unitary]] [[parliamentary]] [[constitutional monarchy]] under [[Zveno|military junta]]<br>{{nowrap|<small>(1934–1935)</small>}} *[[Unitary state|Unitary]] [[authoritarian]] [[absolute monarchy]]<br>{{nowrap|<small>(''de facto'' 1935–1943)</small>}} *[[Unitary state|Unitary]] [[parliamentary]] [[constitutional monarchy]] under a [[Bulgarian Fatherland Front|communist dominant-party military junta]]<br>{{nowrap|<small>(1944–1946)</small>}}}} | stat_year1 = 1915 | stat_area1 = 122134 | ref_area1 = | stat_pop1 = 4,580,000 | ref_pop1 = <ref>{{cite web |url=https://nzhistory.govt.nz/war/bulgaria-facts |title=Central Powers Page 4 – Kingdom of Bulgaria |access-date=14 Jan 2022}}</ref> | currency = [[Bulgarian lev|lev]] | capital = [[Sofia]] | lar