In this period started an important migratory phenomenon. Hundreds of thousands of Greek people transferred in hellenistic reigns such as settlers, mercenaries, officers or traders. While Greece populated and impoverished, after few generations these reigns became populous and extremely multiracial. They were subjects to a sovereign, but citizens of the world (cosmopolitans). The hellenistic art, as well as other disciplines, emerged renewed from the comparison with the traditions of populations coming from Asia Minor, Eurasia, Syria, Phoenicia, North Africa, Persia and India. This occurred thanks to continuous exchanges between dominators and dominated. The hellenistic architecture is different from the previous classic art, because it had a high eclectic characteristic, which showed the tendency of superimposing the Doric, Ionic and Corinthian styles, and that was perfectly adapted to the new decorative tendency that was extremely attentive to scenographic effects. During the hellenistic age, the sculptural styles started to articulate and diversify: with the loss of the classical ideal of beauty, which wanted to reach a perfect form of harmony, there was the tendency to reach a greater dramatization, but also the need to have a detailed and raw realism. Lysippus, was an ancient Greek sculptor, the last of the greatest masters of the classic greek sculpture, and worked for Alexander the Great. There is the Lysippus Art School in Taranto, in honor of the Greek sculptor. The study mentions the main museums and archaeological sites of the region of Taranto and Provinces, and refers also to a special kind of monuments that are the Chamber Tombs and the necropolis. Important in the hellenistic period was the development of technical applications. There were great progresses of war weapons (crossbows, catapults and siege machines) and also navigation became safer, thanks to the construction of firm boats and big lighthouses, such as Alexandria lighthouse. There was the invention of hydraulic machines used to embellish royal palaces with fountains. The major developments of hydraulic techniques were the construction water mills and the planning of big aqueducts. The limit of Alexandrian technology was that it was used within limits, because slaveâ€™s work was efficient and it had a lower cost.