The land with its materials and buried structures is the repository of hidden signs, clues and messages. It is therefore up to the archaeologist to identify, read and translate the passage of man. Archeology aims at the reconstruction of the history of human presence through the traces left on a territory. The land with its materials and buried structures is the repository of these signs. Therefore the excavation activity has the task of understanding the historical cultural sequence of the human traces hidden in the natural stratification. Therefore the excavation activity has the task of understanding the historical cultural sequence of human traces hidden in the natural stratification.