Hajnáčka castle was built in the Gothic style against the Mongol invasion in the mid-1200s. Later, in the mid-15th century, the construction was finished. Hajnáčka was the seat of important feudal lords. In 1545 the castle was besieged and conquered by Ottomans. At the end of the 16th century and the first third of the 17th century castle was an important part of the anti-Turkish defensive line. Nevertheless, it Turks in 1645 again briefly occupied for few years. In the 17th century the castle was only partially inhabitated. In 1703 it was burnt down and no longer restored.
Today the remains of walls stand on the top of the hill which is hard to reach.
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.