Hrad Zvíkov, Česká republika (Zvíkov Castle, Czech Republic) The history of Zvíkov Castle began with the royal house of Přemyslovec. Zvíkov is an outstanding example of Czech medieval secular architecture. The initial construction of Zvíkov took place during the rule of Wenceslas I (1230 - 1253). Written records mention Konrad, founder of the Lords of Janovice, as burgrave of the castle in 1234. Zvíkov was a favorite of King Wenceslas I, who often stayed here.