During the 13th century Prussian Crusade, the current Gvardeysk area was conquered by the Teutonic Knights. To protect Samland from the Nadrovians and Scalovians, the crusaders built a wooden fort between the Deime and Pregel rivers from 1283–90. This was replaced by Tapiau Castle, a stone Ordensburg, in 1351. Vytautas, forthcoming grand duke of Lithuania was baptised here in 1383 after he breached of Krėvė prison. Since 1450 town and castle was named Tapiau. After Teutonic state was downed by Poland and Lithuania, Teutons moved order archives to Tapiau castle and kept it during 1469-1722. Later Tapiau castle was abbandoned. Soviets built a jail on the mound, it remains active.
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.