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					  What are the roman aqueducts?					 
					
					 They are considered the pride of Roman architecture and are supported by arches. 
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					  What is the Rubicon?					 
					
					 The river Julius Caesar crossed when marching into Italy to defeat Pompey. 
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					  What is the Pax Romana?					 
					
					 The era in Rome of peace during Augustus's rule. 
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