So in their turn these Neolithic polished stone implements, which ultimately became both varied and effective as weapons and tools, continued in use long after metallurgy developed. In the Bronze Period metal armor and weapons were for ages of the greatest value. So they were necessarily in the possession of the military and ruling classes only, while the unfortunate serf or common soldier who followed his master to war did the best he could with leather shield and stone weapons. In the ring that clustered around Harold for the last stand on Senlac Hill many of the English thanes died with their Saxon king, armed solely with the stone battle-axes of their ancestors. In Italy also there was a long period known to the Italian archæologists as the Eneolithic Period when good flint tools existed side by side with very poor copper and bronze implements; so that, while the Neolithic lasted in western Europe four or five thousand years, it is, at its commencement, without clear definition from the preceding Paleolithic and at its end it merges gradually into the succeeding ages of metals. After the opening Campignian phase there followed a long period typical of the Neolithic, known as the Robenhausian or Age of the Swiss Lake Dwellers, which reached its height after 5000 B. C. The lake dwellings seem to have been the work chiefly of the round skull Alpine races and are found in numbers throughout the region of the Alps and their foothills and along the valley of the Danube. These Robenhausian pile built villages were the earliest known form of fixed habitation in Europe and the culture found in association with them was a great advance over that of the preceding Paleolithic. This type of permanent habitation flourished through the entire Upper Neolithic and the succeeding Bronze Age. Pile villages end in Switzerland with the first appearance of iron but elsewhere, as on the upper Danube, they still existed in the days of Herodotus. Pottery is found together with domesticated animals and agriculture, which appear during the Robenhausian for the first time. The chase, supplemented by trapping and fishing, was still common but it probably was more for clothing than for food. A permanent site is not alone the basis of an agricultural community, but it also involves at least a partial abandonment of the chase, because only nomads can follow the game in its seasonal migrations and hunted animals soon leave the neighborhood of settlements.