Among the remains of the Solin buildings, of particular interest is the complex known as Gradina (Hill-Fort), next to the very river and the Roman town’s eastern walls. A church of an unusual ground plan, built over the Roman époque remains, is today situated within a medieval fortress. This was built, according to some authors, by the Split archbishop Ugolino de Mala Branca (1349-1388) to protect the people of Split from the people of Klis. Today, it is in a fortress built during the Venetian-Turkish wars, in the 16th century.
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.