Mezue ahịrịokwu na-esonụ: N'afọ 1523, George nke Schellenberg rere Krnov na Hohenzollern margrave George nke Brandenburg-Ansbach, onye nwere ike ịdabere na ihe nketa Hungary nke nwunye ya Beatrice de Frangepan, nwanyị di ya nwụrụ nke Matthias Corvinus. Site na 1532 margrave chịrị Upper Silesia niile, mgbe ọ ketakwara Duchy nke Opole na Racibórz site na Piast duke Jan II the Good. O wughachiri Krnov Castle ma webata Ndozigharị Protestant na Silesia, na-achụpụ ndị Teutonic Knights, Franciscans na Minorites. Ferdinand nke Mbụ nke Habsburg, bụ́ eze Bohemia kemgbe afọ 1526, malitere inwe obi abụọ banyere ike na-arịwanye elu nke ụlọ Protestant nke Hohenzollern nwere n'ala ndị eze Silesian. Ka o sina dị, George nakwa nwa ya nwoke bụ́ Margrave George Frederick, onye chịrị site na 1543, jisiri ike chekwaa duchy ahụ. Esemokwu ahụ ka njọ mgbe George Frederick nwụrụ n'amụtaghị nwa na 1603 ma nyefee Krnov n'aka nwa nwanne nna ya bụ Elector Joachim III Frederick nke Brandenburg, onye nyere ya nwa ya nwoke Johann Georg na 1607. Ndị ọchịchị Habsburg lere duchy ahụ anya dị ka ala e weghachiri eweghachi na mgbe nnupụisi nke Bohemia na 1620
Agha White Mountain Emperor Ferdinand nke Abụọ weghaara ihe ndị Hohenzollern nwere n'ala Bohemia ya. Onye na-eguzosi ike n'ihe nye Ferdinand Prince Karl I nke Liechtenstein, Duke nke Opava kemgbe 1613, natara Krnov. E jikọtara duchi abụọ ahụ na 1623 ma tinye ha n'okpuru Counter-Reformation.