The Tsardom of Bulgaria was the name of the successive Bulgarian states from Simeon's assumption of the title of tsar in 913 until the Fatherland Front's foundation of the People's Republic of Bulgaria in 1946.

The first and the second Bulgarian Tsardoms are not treated as separate entities, but rather as one state restored after a period of Byzantine rule over its territory.

But the third Bulgarian Tsardom was restored after a period of more than four centuries of Ottoman rule, and the government principles of the Medieval period can not be applicable, so it was treated as separate state, which is just a successor of the Medieval Bulgarian Tsardoms.

The first and the second Bulgarian Tsardoms are not treated as separate entities, but rather as one state restored after a period of Byzantine rule over its territory.

But the third Bulgarian Tsardom was restored after a period of more than four centuries of Ottoman rule, and the government principles of the Medieval period can not be applicable, so it was treated as separate state, which is just a successor of the Medieval Bulgarian Tsardoms.