Zbigniew of Brzezia (ca. 1360 – ca. 1425) was a notable Polish

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 knight

Knight

A knight was a member of a class of lower nobility in the High Middle Ages.By the Late Middle Ages, the rank had become associated with the ideals of chivalry, a code of conduct for the perfect courtly Christian warrior....

 and nobleman of Clan Zadora.

Zbigniew served as Marshal of the Crown

Marszalek

Marszałek was one of the highest officials in the Polish royal court since the 13th century and the Grand Duchy of Lithuania since the 15th century...

 from 1399 to 1425 and starost of Kraków

Kraków

Kraków also Krakow, or Cracow , is the second largest and one of the oldest cities in Poland. Situated on the Vistula River in the Lesser Poland region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life...

 from 1409 to 1410. He was a diplomat and a close co-worker of King Władysław II Jagiełło. He was several times an envoy to King of Hungary and Germany Sigismund of Luxembourg

Sigismund, Holy Roman Emperor

Sigismund of Luxemburg KG was King of Hungary, of Croatia from 1387 to 1437, of Bohemia from 1419, and Holy Roman Emperor for four years from 1433 until 1437, the last Emperor of the House of Luxemburg. He was also King of Italy from 1431, and of Germany from 1411...

. During the Battle of Grunwald

Battle of Grunwald

The Battle of Grunwald or 1st Battle of Tannenberg was fought on 15 July 1410, during the Polish–Lithuanian–Teutonic War. The alliance of the Kingdom of Poland and the Grand Duchy of Lithuania, led respectively by King Jogaila and Grand Duke Vytautas , decisively defeated the Teutonic Knights, led...

 in 1410 he commanded the banner

Banner

A banner is a flag or other piece of cloth bearing a symbol, logo, slogan or other message. Banner-making is an ancient craft.The word derives from late Latin bandum, a cloth out of which a flag is made...

of the Marshal of the Crown.