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68- Amphitheatre of Pompeii- 70 BC. It is an important building in the history of Roman architecture. The design of colossium is based on this amphitheatre. It is made of stone, a row of blind arcades shape The exterior wall of the amphitheatre, which made of concrete, faced with the opus Incertum work. The staircase of the amphitheatre was built on a series of arches. This is a unique stair case and there is not any other staircase like these in the history of Roman architecture.
Archaeologist Khaled al-Asaad dedicated his life to excavating and restoring the historic ruins at Palmyra, Syria. In 2015, he risked his life to save many artifacts removing and hiding them as ISIS approached. ISIS detained and tortured the 82 year-old and when he refused to reveal the hiding places of those ancient ISIS beheaded him. Al-Asaad died for his beliefs and trying to preserve priceless and irreplaceable monuments to human history.