Amphitheatre Pula Croatia 

The Pula Arena is the name of the amphitheatre located in Pula, Croatia. The Arena is the only remaining Roman amphitheatre to have four side towers and with all three Roman architectural orders entirely preserved. It was constructed in 27 BC - 68 AD[1] and is among the six largest surviving Roman arenas in the World.[1] A rare example among the 200 Roman surviving amphitheatres, it is also the best preserved ancient monument in Croatia.