| Theodore Svetoslav | |
|---|---|
 | |
| Tsar of Bulgaria | |
| Reign | 1300–1322 |
| Predecessor | Chaka |
| Successor | George Terter II |
| Born | 1270s |
| Died | 1322 |
| Spouse | Euphrosyne Theodora Palaiologina |
| Issue | George Terter II |
| House | Terter |
| Father | George Terter I |
| Mother | Maria Terter |
| Religion | Christianity |
Theodore Svetoslav (Bulgarian: Тодор Светослав, Todor Svetoslav and also Теодор Светослав, Teodor Svetoslav) ruled as emperor (tsar) of Bulgaria from 1300 to 1322. The date of his birth is unknown. He captured northeast fortresses and expanded the territory of the Bulgarian Empire.
Apart from his external and economic successes, Theodore Svetoslav dealt with the separatists among the nobility including his uncle. He persecuted the traitors who he thought were responsible for the Mongol interference and even the Patriarch, Joachim III, was executed.