The Isle of Mull has probably been inhabited since shortly after the end of the last Ice Age, around 11,000 years ago. This is evidenced by radiocarbon dating done in a mesolithic hut at Crieth Dubh on the northwest coast of the island. Later, Bronze Age and Iron Age inhabitants built brochs at Dun Nan Gall and An Sean Chaisteal, and a stone circle at Lochbuie along with numerous burial cairns. Two crannogs there have been dated to the Iron Age.