A Monument Class Description provides a synthesis and summary of the archaeological evidence for a particular type of British ancient monument. The Monument Class Descriptions were created by English Heritage as part of the Monuments Protection Programme. Because archaeological remains are seldom good subjects for rigorous classification, these monument classes are regarded as provisional. However, they provide a good basis for beginning to understand the variability of the archaeological record in England. Prehistoric Monuments Early Prehistoric Monuments Avenues (multi-period) Bank Barrows (multi-period) Bowl Barrows (multi-period) Causewayed Enclosures Concentric Stone Circles Cup and Ring Marked Stones (multi-period) Cursus D-Shaped Barrows Enclosed Cremation Cemeteries (multi-period) Entrance Graves (multi-period) Flint Mines Four Poster Stone Circles (multi-period) Henge Enclosures Henges Hengiform Monuments Inhumation Cemeteries (Prehistoric) (multi-period) Large Irregular Stone Circles (multi-period) Large Regular Stone Circles (multi-period) Long Barrows Long Mortuary Enclosures Long Mounds Monumental Mounds Oval Barrows Pit Circles Pond Barrows Round Barrow Cemeteries (multi-period) Simple Passage Graves Standing Stones (multi-period) Stone Alignments (multi-period) Stone Axe Factories (multi-period) Timber Circles Tor Cairns Bronze Age Avenues (multi-period) Bank Barrows (multi-period) Bell Barrows Bowl Barrows (multi-period) Burnt Mounds Cairnfields Clothes Line Enclosures (multi-period) Coaxial Field Systems (multi-period) - see field systems Cross Dykes (multi-period) Cup and Ring Marked Stones (multi-period) Enclosed Cremation Cemeteries (multi-period) Entrance Graves (multi-period) Fancy Barrows Four Poster Stone Circles (multi-period) Hill Figures (multi-period) Hilltop Enclosures (multi-period) Inhumation Cemeteries (multi-period) Irregular Aggregate Field Systems (multi-period) Itford Hill Style Settlements Large Irregular Stone Circles (multi-period) Large Regular Stone Circles (multi-period) Linear Earthworks (multi-period) Martin Down Style Enclosures Multiple Enclosure Forts (multi-period) Rams Hill Style Enclosures Regular Aggregate Field Systems (multi-period) Ring Cairns Round Barrow Cemeteries (multi-period) Springfield Style Enclosures (multi-period) Standing Stones (multi-period) Stone Alignments (multi-period) Stone Circles---Small Stone Hut Circles Unenclosed Bronze Age Urnfields Iron Age Banjo Enclosures Cliff Castles Clothes Line Enclosures (multi-period) Coaxial Field Systems (multi-period) - see field systems Cross Dykes (multi-period) Enclosed Oppida Gussage Style Settlements Hill Figures (multi-period) Hilltop Enclosures (multi-period) Inhumation Cemeteries (multi-period) Irregular Aggregate Field Systems (multi-period) Irregular Open Field Systems (multi-period) Large Multivallate Hillforts Large Univallate Hillforts Later Prehistoric Ports Linear Earthworks (multi-period) Multiple Ditch Systems Multiple Enclosure Forts (multi-period) Regular Aggregate Field Systems (multi-period) Romano-Celtic Temples (multi-period) Rounds (multi-period) Springfield Style Enclosures (multi-period) Standing Stones (multi-period) Slight Univallate Hillforts Small Multivallate Hillforts Square Barrows Unenclosed iron Age Urnfields Viereckschanzen (multi-period) Wooton Hill Style Enclosures Roman Monuments Aggregate Villages (Romano-British) Amphitheatres (Romano-British) Basilican Temples (Romano-British)