After Vukac supported Tvrtko I against Hungary, they quickly came up through the ranks in Bosnia, while their most prominent member, Hrvoje Vukčić, along with major new possessions in Donji Kraji and Tropolje was awarded with the title Grand Duke of Bosnia.
Hrvoje was the eldest son of Duke Vukac Hrvatinić.
He was married to Jelena Nelipčić, granddaughter of the powerful Croatian noble Ivan I Nelipac (Prince Nelipić) and sister of Ivan III Nelipac (Ivaniš Nelipić).
He is first mentioned in 1376 as being prince and knight during the reign of Hungarian king Louis I. He called himself Count of Donji Kraji.
 
With the help of Hrvoje, King Ostoja came to the throne in 1398.
Sigmund broke into the Donji Kraji, but was suppressed by Hrvoje army.
Ladislaus of Naples awarded him the title of Duke of Split, giving him the islands of Brač, Hvar and Korčula.
He was awarded administration of large territories and the title of Herceg Split Viceroy of Dalmatia and Croatia, grand Duke of Bosnia and Duke of Donji Kraji.
In doing so, he became Sigmund's largest opponent in Bosnia.

In 1407, Sigmund led the Hungarian army and attacked Donji Kraji, but was stopped.
The turning point came after the Sigmund victory in the Battle of Dobor (1408).
Hrvoje did not personally participate in the battle, but the disaster of the Bosnian forces led him to reconcile with the Hungarian king.
In doing so, he lost all the privileges he received from Ladislaus and his power declined.
Hrvoje turned to the Ottomans and brought them to Bosnia resulting in the Battle of Doboj (1415) where Hungarians were defeated.
He died at the beginning of 1416 after which his possessions disintegrated rapidly.
His widow Jelena later married the Bosnian king Ostoja.

Jajce, a major fortified caste, was built in the 14th century and initially was seat of Hrvoje Vukčić.
It would become one of the capital cities of the Kingdom of Bosnia.
After Hrvoje death Jajce has passed back to the royal domain.
It was only royal domain located in Donji Kraji, as Stephen Thomas refers to it as "royal seat", and its citadel has a portal decorated by his Kotromanić royal coat of arms.
After Vukac supported Tvrtko I against Hungary, they quickly came up through the ranks in Bosnia, while their most prominent member, Hrvoje Vukčić, along with major new possessions in Donji Kraji and Tropolje was awarded with the title Grand Duke of Bosnia. Hrvoje was the eldest son of Duke Vukac Hrvatinić. He was married to Jelena Nelipčić, granddaughter of the powerful Croatian noble Ivan I Nelipac (Prince Nelipić) and sister of Ivan III Nelipac (Ivaniš Nelipić). He is first mentioned in 1376 as being prince and knight during the reign of Hungarian king Louis I. He called himself Count of Donji Kraji.  
With the help of Hrvoje, King Ostoja came to the throne in 1398. Sigmund broke into the Donji Kraji, but was suppressed by Hrvoje army. Ladislaus of Naples awarded him the title of Duke of Split, giving him the islands of Brač, Hvar and Korčula. He was awarded administration of large territories and the title of Herceg Split Viceroy of Dalmatia and Croatia, grand Duke of Bosnia and Duke of Donji Kraji. In doing so, he became Sigmund's largest opponent in Bosnia. 
In 1407, Sigmund led the Hungarian army and attacked Donji Kraji, but was stopped. The turning point came after the Sigmund victory in the Battle of Dobor (1408). Hrvoje did not personally participate in the battle, but the disaster of the Bosnian forces led him to reconcile with the Hungarian king. In doing so, he lost all the privileges he received from Ladislaus and his power declined. Hrvoje turned to the Ottomans and brought them to Bosnia resulting in the Battle of Doboj (1415) where Hungarians were defeated. He died at the beginning of 1416 after which his possessions disintegrated rapidly. His widow Jelena later married the Bosnian king Ostoja. 
Jajce, a major fortified caste, was built in the 14th century and initially was seat of Hrvoje Vukčić. It would become one of the capital cities of the Kingdom of Bosnia. After Hrvoje death Jajce has passed back to the royal domain. It was only royal domain located in Donji Kraji, as Stephen Thomas refers to it as "royal seat", and its citadel has a portal decorated by his Kotromanić royal coat of arms.
Donji Kraji