Stephen Thomas was King of Bosnia from 1443 until his death.

After the death of king Tvrtko II, Tomaš took the throne. He is known to have had a wife Vojača

Vojača

Vojača was queen consort of Bosnia as the first wife of King Stephen Thomas of Bosnia.Vojača was a commoner and Patarene by religion. She married Stephen Thomas before his accession and gave birth to his eldest son and heir, Stephen Tomašević. When her husband was elected King of Bosnia, she became...

, a commoner he had promised to marry. After his enthronement, it became clear that she was unsuited to be a queen. Because of this he sought out Pope Eugene IV

Pope Eugene IV

Pope Eugene IV , born Gabriele Condulmer, was pope from March 3, 1431, to his death.-Biography:He was born in Venice to a rich merchant family, a Correr on his mother's side. Condulmer entered the Order of Saint Augustine at the monastery of St. George in his native city...

, who absolved the marriage and declared Thomas to be the legitimate king of Bosnia on 29 May 1445.

Thomas soon made peace with Stjepan Vukčić Kosača

Stjepan Vukcic Kosaca

Stjepan Vukčić Kosača was a Herzegovina nobleman. He was a member of the House of Kosača, a Grand Duke of Herzegovina, Lord of Zahumlje and Primorje and also Herzog of Serbian Saint Sava...

, a powerful noble ruling today's Herzegovina

Herzegovina

Herzegovina is the southern region of Bosnia and Herzegovina. While there is no official border distinguishing it from the Bosnian region, it is generally accepted that the borders of the region are Croatia to the west, Montenegro to the south, the canton boundaries of the Herzegovina-Neretva...

 region. The king was now searching for a new wife, and decided to marry Vukčić's daughter Katarina Kosača, which brought some political stability to the kingdom. They were married on 26 May 1446 in Milodraža near Fojnica

Fojnica

Fojnica is a town and municipality in central Bosnia and Herzegovina, located west of the capital Sarajevo. It lies in the valley of the Fojnička River, tributary of the river Bosna...

. The couple had three children: Catherine, Sigismund

Ishak-bey Kraloglu

Ishak-bey Kraloglu or Sigismund of Bosnia was one of the last known members of the House of Kotromanić.- Childhood :...

, and another son about whom very little is known.

Stephen Thomas died in 1461. He was succeeded by his son from his first marriage, Stephen Tomašević. Tomašević recognized Katarina as queen mother, and she continued to live at the royal dwellings at Bobovac

Bobovac

Bobovac is a fortified city of medieval Bosnia and Herzegovina. It is located near today's Vareš.The city was built during the reign of Stephen II, Ban of Bosnia, and was first mentioned in a document dating from 1349...

 and Kraljeva Sutjeska

Kraljeva Sutjeska

Kraljeva Sutjeska is a Bosnian Franciscan monastery in Bosnia and Herzegovina. It is located near Kakanj, in the village of Kraljevska Sutjeska....

.

Full title

His full title was: "By the grace of God, King of Serbia

Serbia

Serbia , officially the Republic of Serbia , is a landlocked country located at the crossroads of Central and Southeast Europe, covering the southern part of the Carpathian basin and the central part of the Balkans...

, Bosnia, the Seaside, the Hum

Zahumlje

Zachlumia or Zahumlje was a medieval principality located in modern-day regions of Herzegovina and southern Dalmatia...

 land, Dalmatia

Dalmatia

Dalmatia is a historical region on the eastern coast of the Adriatic Sea. It stretches from the island of Rab in the northwest to the Bay of Kotor in the southeast. The hinterland, the Dalmatian Zagora, ranges from fifty kilometers in width in the north to just a few kilometers in the south....

, Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

, the Western Lands, the Lower Edges, Usora, Soli and the Drina".