Biniac has two circular burial navetas that were used around 1400 B.C. and are from an earlier period than the long rectangular constructions like the Es Tudons and Rafal Rubí navetas. The east naveta was built on bedrock and has only one oval-shaped chamber, accessed via a perforated stone slab. Several slabs that had fallen over were found inside. The west naveta is also oval-shaped and the wall on the south side has dry stone cladding, clearly added at a later date.
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.