Gold is the first metal known and used by man. It has always been the symbol of ruling authority, power and divinity. Gold was discovered on the banks of the Nile as long as 6000 years ago. One of world's oldest maps presents ancient gold mines of Egypt 3500 years ago. During the dynasties of pharaohs gold was mined in large scale between the Red Sea and the Nile as well as in Nubia. The ancient mines of Wadi Hammamat, depicted in the old maps, are visible even today.