I have been researching about this topic and while I found a good variety of sites: http://www.initaly.com/regions/sardinia/nuraghe.htm
https://www.sardegnaturismo.it/en/it...toric-sardinia https://www.sardegnaturismo.it/en/ex...uraghe-arrubiu
https://www.italymagazine.com/dual-l...erious-nuraghi

But I don't know if they were still intact by the third and second century BC or if they were already ruins. Does someone know?