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<< Our Photo Pages >> The Maen rock (Constantine) - Natural Stone / Erratic / Other Natural Feature in England in Cornwall

Submitted by maengurta on Thursday, 12 March 2026  Page Views: 15408

Natural PlacesSite Name: The Maen rock (Constantine) Alternative Name: The Omega Stone, The Devil's Nightcap, the great stone at Men (maen)
Country: England County: Cornwall Type: Natural Stone / Erratic / Other Natural Feature
Nearest Town: Penryn  Nearest Village: Constantine
Map Ref: SW7352031510
Latitude: 50.140317N  Longitude: 5.170942W
Condition:
5Perfect
4Almost Perfect
3Reasonable but with some damage
2Ruined but still recognisable as an ancient site
1Pretty much destroyed, possibly visible as crop marks
0No data.
-1Completely destroyed
4 Ambience:
5Superb
4Good
3Ordinary
2Not Good
1Awful
0No data.
3 Access:
5Can be driven to, probably with disabled access
4Short walk on a footpath
3Requiring a bit more of a walk
2A long walk
1In the middle of nowhere, a nightmare to find
0No data.
3 Accuracy:
5co-ordinates taken by GPS or official recorded co-ordinates
4co-ordinates scaled from a detailed map
3co-ordinates scaled from a bad map
2co-ordinates of the nearest village
1co-ordinates of the nearest town
0no data
5

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The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : The Maen Rock (aka - The Omega Stone/ Devil's Nightcap) at SW73523151 (Vote or comment on this photo)
A natural stone or erratic, often confused with the destroyed Constantine tolmen, this 12ft (3.5m) bulbous shaped stone is incorporated into some landscaping by the side of the footpath between Mean Pearne farm and Maen Toll farm. It was first noted by Borlase 1758 who dubbed it as "the great stone at Men" (maen) and attributed all sorts of druidic properties to it.

It is unknown whether the stone has any prehistoric significance however it is situated in an area once abound with antiquities, most of which were slain by the quarrymen.

A hundred yards up the lane is the site of the long destroyed Maen Toll, a gigantic logan stone poised on two points and the nearby farm Maen Pearne was named after a huge longstone of some 7 metres, the tallest in Cornwall which was sadly destroyed in the 1750's. Just across the valley is a small menhir reputed to be the marker or remains of a far larger predecessor.

This stone is in a beautiful area not far from other megalithic sites and is well worth a visit. There is another similar, possibly stranger shaped stone nearby very close to Pixies Hall at Trewardreva.
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The Maen rock (Constantine)
The Maen rock (Constantine) submitted by maengurta : A few fields away from the Maen rock, very close to the fogou at Trewardreva is this strange anvil shaped stone. (Vote or comment on this photo)

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by maengurta : The Maen rock, sole survivor of a megalithic trio of monuments. (Vote or comment on this photo)

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : The destroyed Constantine Tolmen (Maen Toll) (SW73533165) by Richard Tongue in 1835 (Vote or comment on this photo)

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by maengurta : The rear of the Maen rock in someone's garden. (Vote or comment on this photo)

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : The Maen Rock (aka - The Omega Stone/ Devil's Nightcap) (Vote or comment on this photo)

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : The Maen Rock (aka - The Omega Stone/ Devil's Nightcap) at SW73523151

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : A small outcrop (SW73503172) found just to the north of the quarry

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : The quarry in which the 750 ton Tolmen stone (SW73533165) fell after it was blasted by childish quarrymen

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : The large anvil shaped stone (As named by maengurta in their photo of the stone), It's to be found at SW72663040

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : Various aspects of the anvil shaped stone (As named by maengurta in their photo of the stone), It's to be found at SW72663040, Although it's a real shame the stone has had a large chunk cut off it at some point in the past, At least they didn't have it all i suppose!!!

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Bladup : An old photo of the destroyed Constantine Tolmen (Maen Toll) (SW73533165) which was once a little to the north of The Maen Rock (The Omega Stone/The Devil's Nightcap), Photo courtesy of The National Trust

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Andy_Norfolk : An illustration of the long vanished Tolmen (2 comments)

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by Andy_Norfolk : The long vanished Tolmen

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by maengurta : After Borlase.

The Maen rock (Constantine)
The Maen rock (Constantine) submitted by maengurta : Showing the omega shaped profile.

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Nearby sites listing. In the following links * = Image available
 1.1km E 99° Eathorne Menhir* Standing Stone (Menhir) (SW746313)
 1.3km SSW 204° Trewardreva Cross* Ancient Cross (SW7294430341)
 1.4km W 268° Trevease Cross* Ancient Cross (SW7208631514)
 1.6km SSW 203° Piskey’s Hall – The Fairy’s Fogou* Souterrain (Fogou, Earth House) (SW72803003)
 1.7km E 91° Helland House Ancient Cornish Cross* Ancient Cross (SW752314)
 1.8km NNW 342° Nancrossa Barrows* Barrow Cemetery (SW7305033210)
 2.4km ENE 64° Mabe Church Standing Stone* Standing Stone (Menhir) (SW75733246)
 2.4km ENE 64° Mabe Church Cross* Ancient Cross (SW7574132468)
 2.5km S 184° Tolmen Stone (Constantine) Burial Chamber or Dolmen (SW7326429059)
 2.7km SSE 160° Treviades Round* Ancient Village or Settlement (SW74312895)
 3.4km S 178° Goongilling Round* Ancient Village or Settlement (SW7347028070)
 3.7km SW 233° Merther Euny Well* Holy Well or Sacred Spring (SW7042029390)
 3.9km SW 233° Merther-Uny Cross* Ancient Cross (SW7033029310)
 4.0km SSW 207° Carwythenack Round* Ancient Village or Settlement (SW71542808)
 4.1km W 270° Trewavas Round* Ancient Village or Settlement (SW69433166)
 4.1km SW 232° Meruny Cross* Ancient Cross (SW7018029120)
 4.2km NNW 332° Stithians Cupmarked Stones* Rock Art (SW71713536)
 4.3km W 259° Beacon Hut* Chambered Cairn (SW692309)
 4.4km SSE 156° Higher Calamansack Round* Ancient Village or Settlement (SW75152742)
 4.4km N 10° Trevales House Cross* Ancient Cross (SW74443582)
 4.5km NW 322° Mt Wise Farm* Standing Stone (Menhir) (SW7092535175)
 4.6km N 350° Tretheague Ancient Cross* Ancient Cross (SW729361)
 4.7km N 4° Trevales Farm Wayside Cross* Ancient Cross (SW74073614)
 4.8km SW 215° Tolvan* Holed Stone (SW70622770)
 4.9km S 182° Merthen Camp* Ancient Village or Settlement (SW73112664)
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"The Maen rock (Constantine)" | Login/Create an Account | 7 News and Comments
  
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Re: The Maen rock (Constantine) by Anonymous on Tuesday, 07 March 2017
The Stone is bad
[ Reply to This ]

Re: The Maen rock (Constantine) by Anonymous on Monday, 14 September 2009
Hello

Thought this was interesting.

I have been researching more about my local area and the "maen rock" and found this information.

follow this link.

http://www.meiszen.net/family/rogues/reed.htm

Does this say the Maen Rock is at the bottom of the nearby quarry and in fact it is a second rock, the devils night cap that still stands.

http://www.lizardpeninsulaheritagetrust.org.uk/Newsletters/Newsletter%2034.pdf
[ Reply to This ]

Re: The Maen rock (Constantine) by coldrum on Tuesday, 11 August 2009
(User Info | Send a Message)
Pastscape entry:

http://www.pastscape.org.uk/hob.aspx?hob_id=427787
[ Reply to This ]

Re: The Maen rock (Constantine) by maengurta on Monday, 22 September 2008
(User Info | Send a Message)
Dear maen rock farm resident,
I think it is unlikely the stone has been moved at any point due to its gargantuan size and the fact that it is most likely still connected to the granite bedrock. There are drill holes in the stone showing evidence of an abortive splitting operation. The shaping is natural, caused by windborne erosion leading to a distinct underscoring of the rock. This process is much more evident on the stone at trewardreva.
The significance of this stone by itself is largely speculative however it's relationship to other megalithic monuments in the locality may be important. Most significantly would have been the location of the maen pearn, the grandest longstone in cornwall whioch would have stood somewhere nearby. My bet is that it would have been located at the highest point on the hill, where the farm maen pearn is now. Indeed I have inspected a broad, eartfast slab that may be the stump of the stone but was wandering if you had any ideas? Also there is a very large upright slab in a field at calevan which I have so far not investigated but appears decidedly megalithic. The area where you live was undoubtedly once very rich in megalithic sites and remains largely unsurveyed. My feeling is that even amateur fieldwork could uncover some exiting discoveries in your locality- so keep your eyes and mind open and let me know if you find anything
[ Reply to This ]
    Re: The Maen rock (Constantine) by Anonymous on Thursday, 30 July 2009
    Thank you very much, I dont think the stone has moved but I have discovered a very large stone in a very overgrown bush, this seems to tie into the location on my map as the Devils nightcap a few metres away from the Maen Rock. Is it possible there were 2 or is this a very lagre stone that has been placed just for landscaping purposes.

    Is there an email I can send a photo to you?

    Maen Rock Resident
    [ Reply to This ]

Re: The Maen rock (Constantine) by Anonymous on Wednesday, 03 September 2008
Hi

I have been trying to find out about Maen Rock and the devils night cap for a few months now.

What was the stone for or what is it meant to mean?

I live at Maen rock Farm and the land deeds show the rock on our neighbours land then in another location on our land Devils Nightcap.

Can you help me ?

Kind regards

[ Reply to This ]

Re: The Maen rock (Constantine) by Andy_Norfolk on Wednesday, 02 January 2008
(User Info | Send a Message)
This stone is also known as the Omega Stone and the Devil's Nightcap!
[ Reply to This ]

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