Djuma Mosque is the oldest mosque in Derbent and one of the oldest in Russia. It was built over a 6th-century Christian basilica around 733-734 AD. It has a 15th-century madrassa.
There are three naves in the inside of the mosque. The width of central nave is 6.3 m, side naves are 4 m wide. The naves are separated by square columns 97 to 97 cm wide, that have profiled capitals. The columns are connected by lancet arches.
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.