Trakai castle was laid by the Grand Duke Gidemin and finally rebuilt by his grandson Vitovt. This was the heyday of the principality of Lithuania. After the victory of the Lithuanians over the Germans in the famous Battle of Grunwald, when the Teutonic Order was defeated, the castle’s defensive significance lost its relevance, and he played a role as the main residence of the Lithuanian principality. Translated with Google Translate