Rectangular dolmen

Within long mounds, rectangular dolmens are usually oriented at right angles to the axis of the enclosure.

In Mecklenburg-Vorpommern, however only two of the 20 "extended dolmens" surveyed by E. Schuldt were covered by round mounds.

Most types of dolmen that form part of the Nordic megalith architecture genre are open at one end (i.e. are accessible).

Occasionally, a short passage is built in front of the chamber, often of just one or two pairs of stones of 1.0-1.5 metres in length.

In Sicily, Monte Bubbonia dolmen is a chambered tomb 2.20 mt length, made of colossal splinters of rock, with no significant modifications, in rectangular shape.