The Čertovy hlavy ('The Devil Heads') are a pair of 9 metre high rock sculptures in the municipality of Želízy in the Central Bohemian Region of Czech Republic.
Čertovy hlavy were created by Václav Levý in 1841-1846. In terms of dimensions, it is a unique work in the Czech Republic. They are the second largest carved heads in the world, after the carvings of Mount Rushmore in the United States.
The sculptures have been damaged by time and weather. In 2011, the private owner had the surrounding pine forest cut down, allowing the heads to be seen from the I/9 road. Further sandstone reliefs can be found near the Čertovy hlavy, known as Harfenice ('Harpist') and Had ('Snake') reliefs.
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.