Life

In 1396 he could capture the castle of Danjë

Dagnum

Dagnum was an important medieval fortress in contemporary Albania.- History :It is known that in 1395, Konstantin Balšić captured Dagnum, however, lost it to his relative, Đurađ II Balšić, Lord of Zeta...

 and from there he ruled the territory around it. He became an Ottoman vassal and in 1402, together with other Albanian noblemen, he fought alongside Bayezid I

Bayezid I

Bayezid I was the Sultan of the Ottoman Empire, from 1389 to 1402. He was the son of Murad I and Valide Sultan Gülçiçek Hatun.-Biography:Bayezid was born in Edirne and spent his youth in Bursa, where he received a high-level education...

 forces, in the Battle of Ankara

Battle of Ankara

The Battle of Ankara or Battle of Angora, fought on July 20, 1402, took place at the field of Çubuk between the forces of the Ottoman sultan Bayezid I and the Turko-Mongol forces of Timur, ruler of the Timurid Empire. The battle was a major victory for Timur, and it led to a period of crisis for...

. In 1403 after the defeat of the Ottomans in the battle, Koja, gave up his vassalage to Ottomans and became Venice Republic vassal. In the following conflict between House of Balšić

House of Balšic

The Balšić was a noble house that ruled Zeta and the coastlands , from 1362 to 1421, during the fall of the Serbian Empire. Balša, the eponymous founder, was a petty nobleman that held only one village during the rule of Emperor Dušan the Mighty The Balšić was a noble house that ruled Zeta and...

 and Venice Republic, he supported Venice forces. Around 1412, his daughter married Balša III

Balša III

Balša III was the fifth and last ruler of Zeta from the House of Balša, from April 1403 - May 1421. He was the son of Đurađ II and Jelena Lazarević.- Reign :...

 and in return Balša III gave him Budva

Budva

Budva is a coastal town in Montenegro. It has around 15,000 inhabitants, and it is the centre of municipality...

 to administer. After the death of Balša III, Koja's daughter returned to her family in Danjë. In 1422-1423 during the conflict between Stefan Lazarević

Stefan Lazarevic

Stefan Lazarević known also as Stevan the Tall was a Serbian Despot, ruler of the Serbian Despotate between 1389 and 1427. He was the son and heir to Prince Lazar, who died at the Battle of Kosovo against the Turks in 1389, and Princess Milica from the subordinate branch of the Nemanjić dynasty...

 and Venice Republic he supported again Venice. His son Lekë Zaharia

Lekë Zaharia

Lekë Zaharia , was an Albanian nobleman from Zaharia family. He was the only son of Koja Zaharia. In 1444 he was one of the founders of League of Lezhë. In 1445 during the ceremony of the marriage of Skanderbeg sister Mamica Kastrioti, he had a dispute with Lekë Dukagjini. The reason of this...

inherited his domains after his death.