Isabella and John Sigismund left Transylvania on 6August 1551, accompanied by Péter Petrovics. They settled in Kassa (now Košice in Slovakia), and moved to Opole in March 1552. Realizing that the Silesian duchies were poor, they left for Poland before the end of April. During the following years they lived in Kraków, Warsaw, Sanok, and other Polish towns. John Sigismund often went hunting for bison and regularly visited his uncle, Sigismund II Augustus, King of Poland. However, his health was delicate because he suffered from epilepsy and chronic intestinal disorders.