Sanctuary 1 (SN1) was excavated between 2014 and 2015. Though partially looted, areas were documented on the site that shed light on the social practices that went on there. The archaeological material recorded consisted primarily of ceramic fragments in the indigenous (Talaiotic) tradition and burnt animal remains (among them a fragment of whale skull), as well as some stone items. These artefacts, together with a set of radiocarbon datings, confirm that the sanctuary must have been in use before the 6th century BC, and its building could even date back to the 9th century BC. This makes SN1 the oldest horseshoe-shaped sanctuary in Mallorca and calls for the chronological parameters used for this type of construction to be reviewed.