'Sigismund I the Old' (; ;
1 January 1467 –
1 April 1548) of the
Jagiellon dynasty reigned as King of
Poland and Grand Duke of
Lithuania from
1506 to his death at age 81 in
1548. Before that, Sigismund had already been invested as Duke of
Silesia.
Biography

Polish-Lithuanian Coat-of-Arms.
The son of King
Casimir IV Jagiellon and
Elisabeth of Austria Habsburg, Sigismund followed his brothers
John I of Poland and
Alexander I of Poland to the Polish throne. Their elder brother
Ladislaus II of Hungary and Bohemia became king of
Hungary and
Bohemia.
Sigismund was christened the namesake of his mother's maternal grandfather,
Holy Roman Emperor Sigismund, who had died in 1437.
Sigismund faced the challenge of consolidating internal power in order to face external threats to the country. During Alexander's reign, the law ''
Nihil novi'' had been instituted, which forbade Kings of Poland from enacting laws without the consent of the
Sejm. This proved crippling to Sigismund's dealings with the ''
szlachta'' and
magnates.
Despite this ''
Achilles heel'', he established (
1527) a conscription army and the bureaucracy needed to finance it.
Intermittently at war with
Vasily III of
Muscovy, starting in
1507 (before his army was fully under his command),
1514 marked the fall of
Smolensk (under Polish domination) to the Muscovite forces (which lent force to his arguments for the necessity of a standing army). Those conflicts formed part of the
Muscovite wars.
1515 he entered an alliance with the
Holy Roman Emperor Maximilian I.
In return for Maximilian lending weight to the provisions of the
Second Peace of Toruń, Sigismund consented to the marriage of the children of
Vladislaus II of Bohemia and Hungary, his brother, to the grandchildren of Maximilian. Through this double marriage contract,
Bohemia and
Hungary passed to the House of
Habsburg in
1526, on the death of Sigismund's nephew,
Louis II.
The Polish wars against the
Teutonic Knights ended in
1525, when
Albert of Brandenburg, their marshal (and Sigismund's nephew), converted to
Lutheranism, secularized the order, and paid homage to Sigismund. In return, he was given the domains of the Order, as the First Duke of
Prussia. This was called the
Prussian Homage.
Sigismund's
eldest daughter Jadwiga (Hedwig) (
1513-
1573) married Elector
Joachim II of Brandenburg.
In other matters of policy, Sigismund sought peaceful coexistence with the
Khanate of Crimea, but was unable to completely end border skirmishes.
Sigismund was a
Humanist. He and his third consort,
Bona Sforza, daughter of
Gian Galeazzo Sforza of
Milan, were both patrons of
Renaissance culture, which under them began to flourish in Poland and in the Grand Duchy of Lithuania.
On Sigismund's death, his son
Sigismund II August became the last Jagiellon king of Poland and Grand Duke of Lithuania.
Sigismund I owed some allegiance to the Imperial
Habsburgs as a member of the
Order of the Golden Fleece.
Ancestors
See also
★
History of Poland (1385-1569)
★
Zygmunt (bell)