A crannog is the name given in Scotland and Ireland to an artificial island or natural island, used for a settlement and usually linked to shore with a timber gangway or stone causeway. The name can also be used to refer to wooden platforms erected on shallow loch floors, although understandably few remains of this sort have been found. The choice of an island as a home is thought to have been for defence as well as the availability of food in the form of fish nearby.

The islet of Eilean Domhnuill, Loch Olabhat on North Uist may be the earliest crannog, dated to 3200-2800 BC in the Neolithic period. Most crannogs were in use from the Iron Age through to the early Medieval period, at about the same time as the brochs, the wags, duns and the larger roundhouses.

The highest concentrations of crannogs (in Scotland) are found in several lochs within Dumfries and Galloway region, although many have been found in the highlands as well.

Reconstructed crannogs are located in Craggaunowen, Ireland, and on Loch Tay in Scotland.

References

• The Scottish Crannog Centre (http://www.crannog.co.uk) also contains a reconstructed crannog.
• The RCAHMS (http://www.rcahms.gov.uk) (Royal Commission on the Ancient and Historical Monuments of Scotland) pages have a searchable database of all scheduled archaeological sites in Scotland, including crannogs.
• Scotland's Hidden History - Ian Armit, Tempus (in association with Historic Scotland) 1998, ISBN 0-7486-6067-4