| The chamber-tombs can be divided into two broad classes: the 'passage-graves' and the 'allée couvertes', each with more subclasses. The 'stone enclosure' (the 'langgraf' in Dutch) can comprise one or more passage-graves or 'allée couvertes'. Therefore it is treated as a third class on this site. |
| the 'passage-grave' (the 'ganggraf', 'hunebed', 'Ganggrab', 'Emsländische Kammer', 'dolmen à couloir', 'allée coudée', 'jættestue', 'gånggrift'); Van Giffen makes a distinction in this class between the 'ganggraf', the 'portaalgraf', the 'trapgraf' and the 'langgraf'; on this site we don't make any distinction between these subclasses; the 'stone enclosure' or 'langgraf' is considered a third main-class. |
| the 'ganggraf'. |
 |
| the 'portaalgraf'. |
 |
| the 'trapgraf'. |
 |
| the 'allée-couverte': this type of chamber-tomb has three subclasses: |
| the simple chamber ('Urdolmen', 'simple dolmen', 'dolmen'. |
 |
| the more elaborate chamber ('erweiterter Dolmen', 'extended dolmen'). |
 |
| the great chamber ('Großdolmen', 'great dolmen'). |
 |
| the 'stone enclosure' (the 'langgraf', 'Hünenbett', 'dysse', 'runddysse', 'langdysse'):. |
 |