Blatnica castle was built in the 13th century to protect a major trade route running from Nitra to the north. Soon afterwards it became a royal castle but the kings lost their interest in the castle's development after a new route, through Mošovce and Martin was built. The new owners of Blatnica Castle, the Révay family (from 1540), were more generous and the castle was significantly extended in the second half of the 16th century. The last reconstruction dated from 1744. Since 1790 the castle has been abandoned and has turned into ruins.
The castle is built on typo low ridge of Plešovica which separates the Turiec Basin from the Greater Fatra Range. It is freely accessible from the village of Blatnica by a marked footpath. The castle remnants are hidden in a forest with limited views at the Gader Valley, which stretches underneath, and the opposite Tlstá Mountain.
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.