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:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.