Ohlsdorf Cemetery is the fourth-largest cemetery in the world. Most of the people buried at the cemetery are civilians, but there is also a large number of victims of war from various nations. It was established in 1877 as a non-denominational and multi-regional burial site outside of Hamburg. The cemetery has an area of 391 hectares (966 acres) with 12 chapels, over 1.5 million burials in more than 280,000 burial sites and streets with a length of 17 km.
During World War I over 400 Allied prisoners-of-war who died in German captivity were buried here in, as well as sailors whose bodies had been washed ashore the Frisian Islands. In 1923 the remains of British Commonwealth servicemen from 120 burial grounds in north-western Germany were brought to Hamburg. Further dead Commonwealth soldiers of World War II and of the post war period were buried here too.
There are six memorial sites for the victims of the Nazi era. The remains of some 38,000 victims of Operation Gomorrha, the bombing campaign that took place from July 24 to August 3, 1943, lie in a cross-shaped, landscaped mass grave.
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.