The site of Dun an Sticir on North Uist forms a reminder of how different societies adapted and reused structures over time. About 2000 years ago a broch was built on a man-made island in Loch an Sticir. Brochs were relatively tall circular buildings which were used as dwellings and defensive structures by the inhabitants of Northern and Western Scotland during the Iron Age. Dun an Sticir appears to have continued to be inhabited during the Viking period. In the High Middle Ages the (by then very ancient) broch was converted into a small hall or tower house. The Open Virtual Worlds team and Smart History worked with Taigh Chearsabhagh Museum and Arts Centre to create a reconstruction of how Dun an Sticir may have appeared during the Iron Age.