In the period of the so-called "Greek colonisation" the indigenous communities of Sicily came into close contact with different foreign groups of people. But it was not until the 6th century B.C. that these cultural contacts - especially with the settlers of the greek and Phoenician coastal cities - have left deep traces of change in the interior communities. These transformation processes affected all areas of life to a certain degree, likewise the social field of religion. The article examines the implications of these transformation processes on the cult and ritual practice of the local communities of Western and Central Sicily. Starting with the indigenous cult landscape prior to the 6th century B.C, it will be shown what kind of material expressions of ritual and religion can be determined, which belong to a traditional form of living and, therefore, to the "old world". In a second step the focus shifts to the transformation processes that lead to a "new world" and different form of cult sites. The two case studies of the indigenous settlements of Sabucina and Monte Polizzello in central Sicily (prov. Caltanissetta) clearly point out that these two "worlds" are correlated with each other and that the social field of religion played a central role in installing new power structures in the local communities.