During the Iron Age, northern Britain finally emerged into history as Roman writers produced the first written records about the region. However, there accounts are very limited and biased against a land which lay on the edge of the empire. Much of the evidence which we gain about the period is from the archaeology; particularly from settlement evidence. Scotland has a wide range of settlement sites which have been investigated; brochs which are unique to Scotland, crannogs which were built on numerous lochs, hillforts which dominated areas in the south, and roundhouses which were built throughout the country. Nevertheless, there is still a huge amount that we do not know about the Iron Age and archaeologists continue to debate what life was like.