The site of an early medieval chapel or keeill, thought to have been in use between circa AD500 and AD1000 at Greeba Mills.  The site is marked on the 1869 1:2500 scale Ordnance Survey map in field plot 2987.


No trace of the keeill remains but in the past a Mr Watterson discovered five lintel graves, each about 6 feet long and lined with large flags, when he was excavating for the enlargement of outhouses. Many of these large flags are now built into the adjoining walls.


A small slab pierced by a pointed star-shaped figure, possibly from a window of the keeill, was built into one of the outhouses. It was removed in 1948 and is now kept at the Manx Museum (No 170).  A large broken slab, pierced by a countersunk hole, may have formed the lintel of a door. 


An early cross-slab incised on both faces, was found on this site 'many years ago'  (No 38. Now kept at Peel Castle Museum).  


It was feared that the site of a keeill was being damaged by ploughing after a plaited gold ring (PRN 0967.00) was found in 1982 and therefore a trial excavation was undertaken by L.S. Garrad of Manx Museum across the mound evident in the field in 1983.  A single Manx medieval micaceous sherd, of probable 13th/14th-century date, was found, apparently associated with a scatter of stones which had perhaps been paving, but there was no other trace of the keeill or any other structure.