Greece - 200 Euro Gold, ARCHIMEDES, 2015

ARCHIMEDES. Greek mathematician and inventor from Syracuse. He is noted for his discovery of Archimedes' principle (legend has it that he made this discovery while taking a bath and ran through the streets shouting “Eureka!”). Among his mathematical discoveries are the ratio of the radius of a circle to its circumference and formulas for the surface area and volume of a sphere and of a cylinder.