When Frenchmen Borda and Cassini proposed their metric system in 1792, they had no idea it had been invented by the Ancient Mesopotamians 5000 years earlier. Just as the French proposed to use the length of a one-second pendulum to create standards of length, volume and weight, the Mesopotamians created nearly identical meters, liters and kilograms. Our research shows that the Mesopotamians used the sun as their clock, dividing the day into 360 parts. It appears that the Egyptians improved on the timing accuracy by using the stars. Later the Minoans used the planet Venus as a clock. These concepts spread throughout the Ancient world from Britain in the West to Japan in the East. The Minoan standards are immortalized in the Magna Carta of 1215. The saying “a pint a pound the world around” had been true for over 3000 years. In the 19th Century, both Stuart and Penrose accurately measured the dimensions of the Parthenon finding its width to be 0.9997 arc seconds on the polar circumference of the Earth. This accuracy confounded scholars for 150 years. Our research shows the width of the Parthenon in Athens was designed to be 1/30 of the perimeter of the Great Pyramid of Giza. The resulting pendulum when moved north to Athens would increase in length with increasing gravity. This precision was not dumbfounding – it was just dumb luck.