There are many speculations over the difficulty and the time that took the elaboration of the lines, taking into account the period that they were made. However some archaeologists have calculated that a thousand people, working eight hours a day, would have finished the task in three weeks time. Obviously, it was not the real amount of time of the construction, as the lines were made in different periods of time in the course of several centuries, from 300 B.C. until 800 A.D., and even earlier and later.