The bastion is a Renaissance-style fortification and surviving part of the Vilnius Defensive Wall. It consists of a tower merged in the city defence wall, underground gun ports and a connecting corridor, which turns into a 48-metre long tunnel. The bastion was built in the first half of the 17th century by the German military engineer Friedrich Getkant. The Bastion was severely damaged during the wars with Moscow in the middle of the 17th century. During World Wars I and II, German military arsenals were located in the building. You can enjoy a picturesque view of the Old Town from the Bastion terrace.
In 2007 the renovation works of the Bastion of Vilnius Defensive Wall were commenced. The Bastion has been closed for visitors since 2008.References:
Sirmione castle was built near the end of the 12th century as part of a defensive network surrounding Verona. The castle was maintained and extended first as part of the Veronese protection against their rivals in Milan and later under the control of the Venetian inland empire. The massive fortress is totally surrounded by water and has an inner porch which houses a Roman and Medieval lapidary. From the drawbridge, a staircase leads to the walkways above the walls, providing a marvellous view of the harbour that once sheltered the Scaliger fleet. The doors were fitted with a variety of locking systems, including a drawbridge for horses, carriages and pedestrians, a metal grate and, more recently, double hinged doors. Venice conquered Sirmione in 1405, immediately adopting provisions to render the fortress even more secure, fortifying its outer walls and widening the harbour.
Thanks to its strategical geographical location as a border outpost, Sirmione became a crucial defence and control garrison for the ruling nobles, retaining this function until the 16th century, when its role was taken up by Peschiera del Garda.