The Skopje Fortress, commonly referred to as Kale, is situated on the highest point in the city overlooking the Vardar River. The fortress is depicted on the coat of arms of Skopje, which in turn is incorporated in the city's flag.
The first fortress was built in 6th century AD on a land that was inhabited during the Neolithic and Bronze Ages (roughly 4000 BC onwards). It was constructed with yellow limestone and travertine, along with fragments of Latin inscriptions. Material for the fortress originated from the Roman city of Skupi, which was completely destroyed by an earthquake in 518.
The fortress is thought to have been built during the rule of emperor Justinian I and constructed further during the 10th and 11th centuries over the remains of emperor Justinian's Byzantine fortress which may have been destroyed due to a number of wars and battles in the region. The city was capital of the First Bulgarian Empire between 992 and 1015, and was center of the uprising of the Bulgarian Empire against the Byzantine Empire under the rule of Peter Delyan. Not much is known about the Medieval fortress apart from a few documents which outline minor characteristics in the fortress' appearance.
In 1346 at the Skopje Fortress, Stefan Dušan adopted the title of Emperor at his coronation and he had transferred the capital of Serbian Empire to Skopje.
The fortress was partially destroyed yet again by an earthquake in 1963 but was not reconstructed until recently.
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.