Kiiu vassal stronghold, i.e. Kiiu Tower, is located in Kiiu Manor Park. It was erected in 1517 by Baron von Tiesenhausen and it is the smallest stronghold building in Estonia. There are four floors in the tower and from outside the stone wall is surrounded by a wooden circular balcony. The thickness of walls at the foot is 1.8 metres; the inner diameter is 4.3 metres.
The stronghold was destroyed during the Livonian War and it was restored under the leadership of art historian Villem Raam in 1974. Today a café is open in the citadel.
Reference: VisitEstonia
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.