The so-called Astronomical Bastion was part of the Königsberg fortification system. It was built between 1855-1860. The name was inherited from the adjacent observatory built by F. Bessil in the 1813. After the construction of the railway station in the 1910, the part of the bastion was destroyed.
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.