John I Albert was King of Poland and Supreme Duke of Lithuania from 1492 to his death, as well as Duke of Głogów from 1491 to 1498. He was the fourth Polish sovereign from the Jagiellonian dynasty and
John Albert's tomb effigy at Wawel Cathedral
Casimir IV and Elizabeth Habsburg with their thirteen children, 1506. John Albert is placed between brothers Alexander and Vladislaus.
John on an excerpt from Chronica Polonorum, 1521
Konrad III Rudy, Duke of Masovia and John Albert's adversary
The Jagiellonian dynasty,, also called Jagiellon dynasty, House of Jagiellon or simply the Jagiellons, was a Polish cadet branch of the Lithuanian ducal dynasty of Gediminids. It originated with Jogai
Jogaila, later Ladislaus II Jagiełło (c. 1352/1362 – 1 June 1434) was Grand Duke of Lithuania (1377–1434), King of Poland alongside his wife Jadwiga (1386–1399), and then sole King of Poland until his death.
Baptism of Władysław III of Poland at Wawel in 1425
The Crusade of Varna was a series of events in 1443–44 between the crusaders and the Ottoman Empire, culminating in a devastating Christian loss at the Battle of Varna on 10 November 1444.
Ladislaus III during battle of Varna, where he disappeared.