The site of an early medieval keeill or chapel.  The outline of its enclosure is seen on the 1870 1:2500 scale Ordnance Survey map in the field numbered as Plot 173, which is still remembered as the 'Chapel Field' or 'the Glebe'.  The enclosure was about twice its present size until the roadway to the Point of Ayre lighthouse was cut through it. When the present house on the Port Farm was built circa 1908, traces of graves were found at the west end but apparently no lintel graves. It was said that stones taken from the keeill, or its enclosure, were built into the old house standing by the side of the road a little further to the east.