Sigismund I was the King of Poland and the Grand Duke of Lithuania from 1506 until 1548. A Catholic man who was a patron of the arts and helped spread the Renaissance movement to his lands, encouraging the growth of music, painting, literature and learning.
He was also religiously tolerant, giving protection to the Jews and the Eastern Orthodox. Although he was opposed to Lutheranism, he eventually extended the tolerance to the Lutherans also.
Him armies subdued the Order of Teutonic Knights, who ruled in East Prussia. The Order was secularized and then abolished after Sigismund's nephew, who was the Grand Master of the Order, converted to Lutheranism and then submitted Prussia to Poland under Sigismund.
Obv: MONETA: SIGISMVNDI: 1529
Knight riding left on horseback.
Rev: MAGNI:DVCIS:LITVANIE
Imperial eagle facing, wings spread, head left.
Date is almost entirely visible. Picked the piece up today.

