Boris IV
Reign 7 April 2015 – present
Predecessor Kardam II
Heir presumptive Prince Beltrán
Regent Prince Kyril (7 April 2015 – present)
House House of Saxe-Coburg and Gotha
Father Kardam II of Bulgaria
Mother Doña Miriam de Ungría y López
Born 12 October, 1997 (1997-10-12) (age 19)
Sofia, Bulgaria Flag of Bulgaria
Religion Orthodox

Boris, Prince of Turnovo (born 12 October 1997), is the Tsar of Bulgaria. He is the eldest son of Tsar Kardam II of Bulgaria and his wife Doña Miriam de Ungría y López. He is currently the youngest monarch in Europe.


  • 12 October 1997 – 7 April 2015: His Royal Highness The Prince of Turnovo, Prince of Saxe-Coburg and Gotha, Duke of Saxony
  • 7 April 2015 – present: His Majesty The Tsar of the Bulgarians

Boris, Prince of Turnovo
Cadet branch of the House of Wettin
Born: 12 October 1997
Royal titles
Preceded by:
Tsar of Bulgaria
Prince Beltrán

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