Bosporthennis

Bosporthennis Cornish: Bosporthenys
Bosporthennis Location within Cornwall
OS grid reference	SW438364
Civil parish	Zennor
Unitary authority	Cornwall
Shire county	Cornwall
Region	South West
Country	England
Sovereign state	United Kingdom
Post town	Penzance
Postcode district	TR20
Police	Devon and Cornwall
Fire	Cornwall
Ambulance	South Western
UK Parliament	St Ives

Bosporthennis (Cornish: Bosporthenys) is a hamlet south of Treen in the civil parish of Zennor on the Penwith peninsula in west Cornwall, England, United Kingdom.

Antiquities

There is a scattered settlement of at least three courtyard houses dating from the Late Iron Age at the eastern foot of Hannibal's Carn. The best preserved has walls up to 1.5 metres high, with an adjoining paddock. Another has a late medieval cowhouse built inside its walls. Within the settlement there is a feature called the Bosporthennis Beehive Hut (grid reference SW43603607), which has been identified as an above ground fogou, similar to the round, subterranean chamber at Carn Euny. This identification is considered doubtful, Clark discussed the structure and concluded that it does not possess enough of the usual features of a fogou for it to be regarded as such. The Bosporthennis chamber, made of corbelled stone, is 4 metres across and is connected to a smaller oblong chamber, originally the entrance, 3.3 metres by 2.1 metres, both are now roofless.

Bosporthennis Quoit (grid reference SW43563654) is a portal dolmen laying within a mound 6 metres across and 0.8 metres high. Three of the original four upright stones survive, of which one is 1.5 metres high, and the chamber is 1.5 by 1.3 metres. The capstone currently has a diameter of 1.6 metres, and is very round as it had been trimmed for use as a millstone. When excavated in 1872 sherds of pottery were found alongside calcined bones.