The other broch claimed to be substantially older than the 1st century BC is Crosskirk in Caithness, but a recent review of the evidence suggests that it cannot plausibly be assigned a date earlier than the 1st centuries BC/AD.MacKie, E. W. (2007) The Roundhouses, Brochs and Wheelhouses of Atlantic Scotland c. 700 BC – AD 500: architecture and material culture. Part 2 The Mainland and the Western Islands. British Archaeological Reports British Series. Oxford.For the C14 dates for the Shetland sites see Shetland Amenity Trust Retrieved 14 August 2007.
The other broch claimed to be substantially older than the 1st century BC is Crosskirk in Caithness, but a recent review of the evidence suggests that it cannot plausibly be assigned a date earlier than the 1st centuries BC/AD.MacKie, E. W. (2007) The Roundhouses, Brochs and Wheelhouses of Atlantic Scotland c. 700 BC – AD 500: architecture and material culture. Part 2 The Mainland and the Western Islands British Archaeological Reports British Series. Oxford.For the C14 dates for the Shetland sites see Shetland Amenity Trust Retrieved 14 August 2007.