A building with an aisle along one or both sides. Usually a row of posts separates the main space from the aisle.
 

A subsidiary enclosure externally attached to an enclosure of known or unknown date and function. The annexe is generally smaller than, and secondary to, the main enclosure. Use more specific site type where known. Do not use for Roman military sites.
 

A structure over an opening, formed of wedge-shaped blocks of brick or stone held together by mutual pressure and supported at the sides. A component; use for free-standing structure only.
 

A spatially discrete scatter of mixed artefactual material found on the ground, seabed or riverbed which may have been deposited over time rather than resulting from one particular event. Index particular types where appropriate.
 

An obstruction, usually manmade, which is used to restrict or prevent access to a settlement, building or area of land. Use more specific type where known.
 

The limit to an area as defined on a map or by a marker of some form, eg. BOUNDARY WALL. Use specific type where known.
 

A structure of wood, stone, iron, brick or concrete, etc, with one or more intervals under it to span a river or other space. Use specific type where known.
 

A fortress and dwelling, usually medieval in origin, and often consisting of a keep, curtain wall and towers etc.
 

A modern building in which the load is carried by a reinforced concrete framework. Use for reinforced concrete buildings.
 

A large, metal or wooden structure, used for raising, lowering and moving heavy objects. Use more specific type where known.
 

A long and narrow hollow or trench dug in the ground, often used to carry water though it may be dry for much of the year.
 

A bank or mound of earth used as a rampart or fortification.
 

A long ridge of earth, rocks or gravel primarily constructed to carry a roadway.
 

An area of land enclosed by a boundary ditch, bank, wall, palisade or other similar barrier. Use specific type where known.
 

A building or complex, housing powered machinery and employing a large workforce for manufacturing purposes. Use specific monument type where known.
 

Small areas of indeterminate function.
 

The approximate location at which stray finds of artefacts were found. Index with object name.
 

A building constructed with the minimum amount of combustible materials.
 

A layer of stone, brick or boards, etc, on which people tread. Use broader site type where known.
 

A building for human habitation, especially a dwelling place. Use more specific type where known.
 

A furnace or oven for burning, baking or drying. Use specific type where known.
 

A complex or network of earthwork or cropmark linear ditches, banks or other features. Use specific type where known.
 

Area feature visible as an earthwork or cropmark with no known function.
 

A modern building in which the load is carried by a metal girder framework and infilled with a light curtain wall.
 

An artificial elevation of earth or stones, especially the earth heaped upon a grave. Use more specific type where known.
 

A mill, on two or more levels.
 

A single storey building designed so that windows incorporated into the saw tooth roof catch the available light.
 

An enclosure of stakes driven into the ground, sometimes for defensive purposes.
 

Unspecified. Use specific type where known.
 

A structure indicated by the presence of post holes and of uncertain interpretation.
 

A building constructed from prefabricated sections. Use more specific type where known.
 

Circular or near circular ditches, usually seen as cropmarks. Use the term where the function is unknown. Ring ditches may be the remains of ploughed out round barrows, round houses, or of modern features such as searchlight emplacements.
 

A church, usually found in East Anglia, of early Medieval and/or Medieval date with attached or detached round tower.
 

A single storey mill used in the textile industry.
 

A structure which protects an area of ground from the weather.
 

A building constructed with a basic timber framework; between the members are panels which can be infilled with timber, wattle and daub, plaster or brick.
 

A tower-like structure of wood or brick with a wooden cap and sails which are driven around by the wind producing power to work the internal machinery. Use with product type where known.