Generally speaking, the less complex the passage tomb the older it is.

Of their list, only passage tombs appear to have widespread distribution throughout Europe.

There are also several passage tombs and many tumuli nearby.

This appears to be one of the first uses of the term passage tomb.

The earliest passage tombs seem to take the form of small dolmens.

Sometimes passage tombs are covered with a cairn, especially those dating from later times.

It is the highest known passage tomb in Britain and Ireland.

Passage tombs on the site are aligned with the Equinox sunrise.

Knockroe contains a passage tomb which is protected by listing order.

The new façade built over the entrance to the passage tomb was not breached.

The most famous megalith is Newgrange passage tomb in co.

However, in some respects the Carrowmore sites are atypical passage tombs.

Passage tombs are usually found in prominent locations, such as hill-tops, with spectacular views.

Many megaliths are left standing today, such as portal dolmens and passage tombs.

Passage tombs consisted of a central burial chamber, with a long passageway to the entrance.

This is actually a neolithic burial chamber, and the highest remaining passage tomb in Ireland.

Carrowmore passage tomb cemetery is located at the eastern foot of Knocknarea.

This stone passage tomb is often misunderstood to have been a chair, as is often told in local history.

It faces towards the summit of Montpelier Hill where there once stood a passage tomb.

Twelve more passage tombs are located close by, most of which form part of the Keshcorran complex.

It was repaired in 1985 and excavation at the time showed that the chamber was the remains of a passage tomb.

The project team also acknowledged the experience gained from previous restoration efforts notably at the nearby passage tomb in Newgrange.

Although it has not been excavated, it is believed to conceal a Neolithic passage tomb.

It would seem that when the original purpose of the "passage tombs" was abandoned, they were adapted for use as crypts by later generations.

The passage tomb contains elaborate abstract carvings on smooth hardstone which date back more than 5,000 years.

As a result, the site was for many years thought to be a passage grave.

The first project was on a passage grave called "Jordeh0j".

The area is also known for its passage grave discovered in the 1880s.

Further west is the third member of the complex - another passage grave.

Not all passage graves have been found to contain evidence of human remains.

A passage grave was built in the centre of the henge.

This suggests that a passage grave once sat atop the hill.

The hill is particularly important for the two possible passage grave structures atop it.

From the pollen analysis we have a picture of the landscape around the passage grave.

Not far from the stones, there were also two giant passage graves, about 20 paces long.

The tombs at either end are of the passage grave sub-type.

It has been suggested that this means they are related to the passage graves found in Denmark and elsewhere.

In its place a passage grave was built.

It is the remains of a neolithic passage grave which was reconstructed in 1921.

Not far from the dolmen is a second, smaller one, and about 250 metres west of it a large passage grave can be found.

There is an extensive cemetery of eighty passage grave tombs.

It had a side entrance; this type of grave is known as a passage grave.

It is a rare form of a passage grave, known as an Entrance grave.

It is a passage grave and dates from the 2nd millennium B.C.

Many dolmens and rock tombs (especially passage graves) date from this period.

But it could also have been inspired by the interior architecture of local passage graves from the Neolithic.

Although many monument types received this form of art the majority is carved on Neolithic passage graves.

They are also known as undifferentiated passage graves.

Below this platform is a protected passage grave.

Originally there was a cairn with a prehistoric passage grave on the summit.