During the 1573 Polish election, Albert Frederick attempted to gain acceptance to the Polish senate but was opposed by the powerful Jan Zamoyski (later Grand Hetman of the Crown of the Kingdom of Poland) who feared the influence of Protestants in the Polish legislative body.
She was given in marriage to Jan Zamoyski, Chancellor of Poland, in 1583.
When in May 1600, Michael the Brave removed Ieremia Movilă from Moldavia's throne by winning the battle of Bacău, briefly reuniting under his rule Moldavia, Wallachia, and Transylvania, a Polish army led by Jan Zamoyski drove the Wallachians from Moldavia.
At the proposal of Jan Zamoyski, Chancellor of Poland, Sigismund sent envoys to Elizabeth I of England, asking her to intervene on his behalf at the Sublime Porte.
He sent his envoys to Prague to negotiate with Rudolph II, while his confessor, Carillo, started negotiations with Jan Zamoyski in Poland.
He worked closely with chancellor Jan Zamoyski.
However, chancellor Jan Zamoyski and other opponents of Habsburgs persuaded many of the lesser nobility to demand a "Piast king", a Polish king.
After securing control over the Commonwealth, Báthory had a chance to devote himself to strengthening his authority, in which he was supported by his chancellor Jan Zamoyski, who would soon become one of the king's most trusted advisers.
One of the most famous members of this movement was Jan Zamoyski.
Several magnates converted to Calvinism or Lutheranism during the Reformation started by Martin Luther and John Calvin, most notably Stanisław Zamoyski, Jan Zamoyski, Mikołaj Rej, Andrzej Frycz Modrzewski, Johannes a Lasco (Jan Łaski) and Mikołaj "the Black" Radziwiłł. Throughout the 16th century, Frycz Modrzewski advocated for renouncing Rome's authority and establishing a separate and independent Polish Church.
After the death of Bishop Vasa on 9 May 1655, he was taken in by his wealthy uncle, Jan Zamoyski, Voivode of Sandomierz, who funded his education.
The list of notable professors and alumni is long, containing, among others, the names of Bembo, Sperone Speroni, the anatomist Vesalius, Copernicus, Fallopius, Fabrizio d'Acquapendente, Galileo Galilei, William Harvey, Pietro Pomponazzi, Reginald, later Cardinal Pole, Scaliger, Tasso and Jan Zamoyski.
He was supported by his aunt Queen Anna, Hetman Jan Zamoyski and those nobles who considered him a Piast (native candidate), but he was opposed by the nobles loyal to the Zborowski family.
Ultimately, Hetman Jan Zamoyski defeated Maximilian at the Battle of Byczyna and took him prisoner.
The contest between the King and Chancellor-Hetman Jan Zamoyski, began during Sigismund's first Sejm (Parliament) sitting, the so-called Pacification Sejm, which met at Warsaw in March 1589.
His policies were opposed by many within the circles of the wealthy Polish nobility (the szlachta), most notably the chancellor Jan Zamoyski.
As described by UNESCO: Zamość is a unique example of a Renaissance town in Central Europe, consistently designed and built in accordance with the Italian theories of the "ideal town," on the basis of a plan which was the result of perfect cooperation between the open-minded founder, Jan Zamoyski, and the outstanding architect, Bernardo Morando.
Zamość was founded in 1580 by the Chancellor and Hetman (head of the army of the Polish–Lithuanian Commonwealth), Jan Zamoyski, on the trade route linking western and northern Europe with the Black Sea.
The Qahal of Zamość was founded in 1588 when Jan Zamoyski agreed to Jewish settlement in the city.
The settlement rights given by Jan Zamoyski were re-confirmed in 1684 by Marcin Zamoyski, the fourth Ordynat of Zamość estate.