The traditional village of San Giovanni di Sinis, enriched by the ruins of the ancient city of Tharros, is home to a historically-architecturally priceless gem. The small church of San Giovanni.
The building with three naves dates to pre-Romanesque times (XI century) but is the result of the metamorphosis of a pre-existing Byzantine church with cross-in-square layout dating from between the VI and the VII centuries. All that is left of it are the domed body and cross arms. The barrel vault was originally set at a lower level than the current one.
Sunlight faintly penetrates through an octagonal window which highlights the contrast between the interior darkness and the bright facade. Indeed, the structure is made up of bare blocks of sandstone which bring to mind the walls of Tharros, firstly a Phoenician-Punic colony and then a Roman one.