1529 AD., Torun mint for Prussia, Zygmunt I Stary of Poland, Grossus.

Poland, Zygmunt I Stary / Sigismund I (1506-1548), Torun mint for Prussia, 1529 AD.,
Grossus (22 mm / 1,67 g),
Obv.: SIGIS. I. REX. PO. DO. TOCI. PRV , crowned, draped bust right.
Rev.: GROSS.COMV.TERR.PRVSS.15Z9 , "Groschen, common to all Prussian territory", around eagle with sword.
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Sigismund I , 1506-1548 King of Poland and Grand Duke of Lithuania, *1467 in Kraków, son of Elisabeth of Habsburg and Casimir IV Jagiello, King of Poland and Grand Duke of Lithuania. Sigismund married Barbara Zápolya from Transylvania in 1512. After her death he married Bona Sforza from Milan in 1518. Their son Sigismund II August was Grand Duke of Lithuania and the last Jagiellon King of Poland. Sigismund and Bona Sforza were lovers of the fine arts. They brought Italian artists to Kraków and propagated Renaissance ideals throughout the country. The period of the two Sigismunds is known as the Golden Age of Polish culture.
Sigismund's nephew Albert of Brandenburg-Ansbach was the last grand master of the Teutonic Order. On 10 April 1525, he took the oath of fealty on the marketplace of Kraków. In return, Sigismund made him the first Duke of Prussia and invested him with the domains of the Order. This so called "Prussian Homage" converted the catholic Teutonic Order into the secular lutheran Duchy of East Prussia as a fief of catholic Poland. Western Prussia had already become the Polish province of Royal Prussia in 1466. Sigismund added the duchy of Mazovia (now the province of Warsaw) to the Polish state when the last ruler of the Piast dynasty died in 1529. His country extended from the Baltic Sea to the Black Sea. Sigismund had to fight off attacks from Russians and Tatars. Domestically, he asserted royal power against the predominant nobility.

West Prussia fell under Polish government in 1466, after her secession from the Teutonic Order in 1454. King Sigismund largely confirmed the rights of the diet. The Prussian eagle with brandishing sword arm became the coat of arms of "royal Polish Prussia". The Prussian eagle is derived from the coat of arms of the Teutonic Order: a cross surmounted by a black imperial eagle. The crown on the eagle's neck stands for "being put to the yoke". The sword arm is a symbol of secular law. The first king's governor in West Prussia used this coat of arms to seal state documents.