Man to become sedentary, at the entrance of his home put a stick upright in the ground: in attempts to measure time, at some point the sundial came. You could see that as time passed, the shadow of shortening and lengthening would. This was the first rudimentary contraption so the man had to time.
The oldest clock known sun was found in Egypt and dates back to approximately 1500 BC, during the reign of Thutmose III. It was two strips of stone, one being the "needle" and another who was in which were marked "hours". Currently, a copy of such watches is preserved in the Louvre Museum in Paris.
The Greeks then the Romans studied in more detail sundials, i created the Scaphe, which consisted of a block in which a cavity is made hemispheres, and in the center a hole is left to spend i sunlight thus bulged hours.
With the arrival of the Arabs, i great mathematical astronomers, they perfected the art of the quadrants and then created the astrolabe.
And, later, the technique spread and began to build sundials of all types and all possible material. Of these artisans ended up all valuables that sometimes aimed aesthetic pleasure rather than practical use.
A mid-sixteenth century did the mechanical clock appearance. Even so, they still used the sundial because of the high cost of mechanical, and also by the use of sundials, most reliable, time to put on the mechanics.
Anyway, luckily for fans sundials, they have never ceased to be built i, at present, in addition to new instances created in recent times, can enjoy an extensive heritage of sundials around the world.