1779 - Cieszyn peace ending the Prussian - Austrian war
From 1740, there were several wars called Silesian Wars between Frederick I the Great, the Prussian king, and the empress Maria Theresa, and later also her son Joseph II, for the affiliation of Silesia. The last of these wars, called the war for Bavarian succession or the potato war, ended with the signing of peace in Cieszyn, under which the issues of Bavarian succession and status quo in Silesia were regulated, which meant that most of Silesia passed under the rule of the Hohenzollerns. The peace agreement was signed on 13 May 1779 in the session room of the Cieszyn regional council (today the building at Plac Dominikański/ Dominicans’ Square). A collection of portraits of deputies having a part in the negotiations is kept in the Cieszyn museum.