Not only did the number of settlements grow during this period, but also their size and density. First, the old familiar huts were frequently substituted by groups of family housing, composed generally of one or more huts with hearth, plus round granaries, and elongated or square sheds and workshops. At the same time, these houses and groups tended to occupy most of the internal room of the hill-forts, reducing the communitarian open spaces, which in turn would have been substituted by other facilities such as saunas, communitarian halls, and shared forges.