Ojców Castle was part of a system of castles known as the Eagle's Nests - formerly protecting the southern border of the Kingdom of Poland. Currently it houses a museum dedicated to the castle in its renovated castle-tower. The castle was used as a stronghold, built by Casimir III the Great in the second half of the 14th century.
A legend mentions, that the caste was built by the Duke of Wrocław Wiesław I, Popiel's brother-in-law, however te first recorded information about the castle comes from the fourteenth century - linking up with King Casimir III the Great, who used the castle as part of his defensive line against the Kingdom of Bohemia and the south. The King was called the castle in honour of his father, Władysław I Łokietek, calling it Father by the Rock. In 1665 the stronghold was taken over by the Swedes, which they partially burned and deconstructed. The House of Koryciński, who owned the castle, had renovated it, and built additional living quarters. Various battles throughout the oncoming centuries had caused the castle to be shifted between different owners. Causing the castle to go through several cycles of renovation and deconstruction, currently the castle stands as the picturesque, and renovated ruin.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.