The site of an early medieval keeill or chapel, which would have been in use between circa AD500 and AD1000.   St Matthew's Chapel or Keeill Vian was recorded by P.M.C. Kermode in 1915, when the ruined walls were in part preserved through having been converted into a root-house.  The chapel measured internally 7.0 metres x 3.9 metres and the walls, which stood generally up to their eaves, averaged in width 0.8 metres. The west end appeared to have been rebuilt and the building may have originally measured about 8.0 metres long.  There was no trace of an altar. A doorway - possibly modern - was in the east wall with possible remains of a window in the south wall. 


The building was orientated east-southeast to west-northwest. The walls were badly bulging and decayed so that Kermode was unable to examine the foundations. The side walls were skirted by stone slabs, set on end, which were a feature of some older keeills, but the thickness of the walls and style of construction throughout indicated that the building did not belong to the oldest period; the dedication of the Keeill to St Matthew also indicated this. 


The enclosure was on a naturally raised plateau about 120 metres above sea level, but its bounds could not be clearly traced, but they were shown on the 1870 1:2500 scale Ordnance Survey map. Graves had been found across the farm road and suggested that the burial ground extended further to the north. Many lintel graves had also been seen to north and west of the building.