Pentre Ifan (literally 'Ifan's village') is the name of an ancient manor in the community and parish of Nevern, Pembrokeshire, Wales.

An elaborate entrance façade surrounding the portal, which may have been a later addition,[6] was built with carefully constructed dry stone walling.

First, such monuments typically have a large capstone derived from a glacial erratic, far bigger than is required or sensible if the aim is to roof a chamber.

Sometimes, as here, this has been arrived at by splitting the rock; at other sites, such as Garn Turne, some 12 km to the southwest, it has been laboriously 'pecked' off using stone tools.

[8] If these are the key elements of the monument then, it is argued, the stones were never designed to be buried within a mound, and they never formed a chamber to contain bones.

[10] The sheer size of the huge capstone that is supported by the larger dolmens makes it overwhelmingly likely that the stone was not brought in from elsewhere, but already stood as an independent glacial erratic on the same spot it now occupies.

Evidence from the 1948 excavation is compatible with the idea of a large pit being dug at Pentre Ifan, to expose and work on the stone, perhaps splitting it to create a flat underside, It could then be levered vertically upwards a little at a time, using poles, ropes, and large numbers of people, and packed into place using a growing heap of boulders.

Pentre Ifan was studied by early travellers and antiquarians, and rapidly became famous as an image of ancient Wales,[12] from engravings of the romantic stones.

Perhaps as result of Pitt Rivers' visit, this protection was put in place, and the Commissioner of Works and various successor bodies have been guardians of Pentre Ifan ever since.