Answer
Sigismund Augustus was the only son of Sigismund I the Old and Bona Sforza. He was born in Krakow on January 1, 1520. He was the King of Poland from 1548 until his death in 1572. He was also the Grand Duke of Lithuania from 1548 until his death. Sigismund Augustus was a very popular king. He was known for his intelligence and his love of art and literature.