János Albert I, a member of the Jagiellonian house, was king of Poland between 1492 and 1501. IV. He was born as the second son of Kázmér and Erzsébet Habsburg, the grandson of King Albert of Hungary on his mother's side. Albert János was crowned king of Poland on September 23, 1492 in Kraków. During his reign, the Polish noble parliament (Sejm) was strengthened and he endowed the Sejm with extensive legislative powers. Albert János also tried to obtain the Hungarian crown. He penetrated as far as Rákos-mező, but was eventually driven out of the country by the troops of the Transylvanian voivode Pál Kinizsi and István Báthory. He was forced to renounce his claim to the throne. During his reign, the Turks occupied the cities of Kilia and Belgorod on the Black Sea coast. János Albert led a campaign to Moldavia, but suffered a heavy defeat in the Battle of Koźmin. From 1498 to 1501, the king was busy repelling Tatar attacks at Poland's eastern borders. Before his death, he was forced to invade the Prussian estates of his disobedient vassal, Frigyes Szász, Grand Master of the German Knights. János died on June 17, 1501 in Toruń, Poland. He had no wife and no descendants, so after his death the throne passed to his younger brother, Sándor. The life and reign of János Albert contained many exciting events and contributed to the development of Polish history. His resting place is in the Wawel Cathedral.

Polish King John Albert I reigned from 1492 to 1501 and was a member of the Jagiellonian House. During its minting, it issued several types of coins, the most characteristic of which were the following: The denarius (Polish: denar) was a small silver coin issued by the king's father IV. Kázmér introduced it in 1484. On one side of the denarius was the coat of arms of the king, and on the other side was the depiction of St. George the Dragon Slayer. The value of the denarius was equal to 1/60 of a gold forint. The gold forint (Polish: złoty) was a high-value gold coin introduced by the king in 1496. The portrait of the king was on one side of the gold forint, and the Polish coat of arms on the other. The value of the gold forint was equal to 60 denars. The half gold forint (Polish: półzłoty) was a smaller gold coin introduced by the king in 1498. On one side of the gold half forint was the portrait of the king, and on the other the Polish coat of arms. The value of half a gold forint was equal to 30 denars. The gros (Polish: grosz) was a medium-value silver coin minted by the king in 1499. The coat of arms of the king can be seen on one side of the gros, and the Polish coat of arms on the other. The gross value corresponded to 3 denars.