Land settlement at Ravenna in hystorical times as derived
from archeological finds. The main rebuildings of the city are shown:
wood on palafittes (a);
port development from I century BC to II century AD (b);
empire capital (V century AD) and capital of barbarian reigns (VI century AD) (c);
Venetian domination (XV century AD) (d);
1,2,3: time of the floor upheaval of the paleochristian basiliques.