Khertvisi is one of the oldest fortresses in Georgia and was functional throughout the Georgian feudal period. It was first built in the 2nd century BC. The church was built in 985, and the present walls were built in 1354. As the legend says, Khertvisi was destroyed by Alexander the Great.
In the 10th-11th centuries it was the center of Meskheti region. During the 12th century it became a town. In the 13th century Mongols destroyed it and until the 15th century it lost its power. In the 15th century it was owned by Meskheti landlords from Jakeli family. In the 16th century the southern region of Georgia was invaded by Turks. During next 300 years they have owned Khertvisi too.
At the end of the 19th century Georgian and Russian army returned the lost territories and Khertvisi became the military base for Russian and Georgian troops. Khertvisi fortress is situated on the high rocky hill in the narrow canyon at the confluence of the Mtkvari and Paravani Rivers.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.