The origin of brochs is a subject of continuing research. Eighty years ago most archaeologists believed that brochs, usually regarded as the 'castles' of Iron Age chieftains, were built by immigrants who had been pushed northward after being displaced first by the intrusions of Belgic tribes into what is now southeast England at the end of the 2nd century BC and later by the Roman invasion of southern Britain beginning in AD 43. Yet there is now little doubt that the hollow-walled broch tower was an invention in what is now Scotland; even the kinds of pottery found inside them that most resembled south British styles were local hybrid forms.
the origin of brochs is a subject of continuing research eighty years ago most archaeologists believed that brochs usually regarded as the 'castles' of iron age chieftains were built by immigrants who had been pushed northward after being displaced first by the intrusions of belgic tribes into what is now southeast england at the end of the 2nd century bc and later by the roman invasion of southern britain beginning in ad 43 yet there is now little doubt that the hollow-walled broch tower was an invention in what is now scotland; even the kinds of pottery found inside them that most resembled south british styles were local hybrid forms