A: Harun al-Rashid i believe<span />
Answer:
They developed many new techniques for buildings and construction of all types including the invention of concrete, Roman roads, the invention of Roman arches, and incredibly well built aqueducts that ran for miles before they reached the end and delivered fresh water.
Roosevelt became the youngest president in American history at the age of 42.
John Calvin was a French theologian, pastor and reformer. This is true.
