The horseshoe-shaped structures known as sanctuaries are buildings unique to the Iron Age in Mallorca, to which ritual or social redistribution functions are attributed. This is because some of the most outstanding prehistoric artefacts in Mallorca have been unearthed in them, like for example the bull’s heads of Costitx (Son Corró) or the bronze sculptures of warriors (Son Amer). Chronologically, they are associated with the late Iron Age (post-Talaiotic, 500-123 BC), although there is evidence they may be earlier (Son Mas sanctuary). Excavation of Sanctuary 1 at S’Illot may reveal a lot in this respect as, if the initial results are confirmed, it might be one of the oldest sanctuary structures in Mallorca.