Though still adhering to the Catholic faith, his father had Joachim and his younger brother educated from 1515 to 1517 by the Lutheran reformer Johann Hess, who at the time held a canonicate in Nysa.

In a joint deed dated 25 June 1535, they awarded the city of Srebrna Góra (Silberberg) in the Sudetes mountains, which belonged to the Münsterberg duchy, the status of free mining town.

In return, Joachim and his brothers waived their claims on the Silesian northwestern lands of Krosno which had been incorporated into the Neumark territory of Brandenburg.

[2] In 1542, Joachim and his brothers pledged the heavily indebted Duchy of Münsterberg to their uncle Duke Frederick II of Legnica.

The Duchy of Münsterberg reverted as a ceased fief to the Bohemian Crown upon the death of Joachim's nephew Duke Charles Christopher in 1569.