Golden ratio
Hellenistic engineers of the Eastern Mediterranean were responsible for a number of inventions and improvements to existing technology. Archimedes invented several machines. Hellenistic engineers often combined scientific research with the development of new technologies. Technologies invented by Hellenistic engineers include the ballistae, the piston pump, and primitive analog computers like the Antikythera mechanism. Hellenistic architects built domes, and were the first to explore the Golden ratio and its relationship with geometry and architecture.