 St Mary 's has national recognition and statutory protection from alteration as it has been designated as a Grade II listed building – the lowest of the three grades of listing , designating " buildings of special interest , which warrant every effort being made to preserve them " . It was given this status on 12 May 1970 and has been listed because it is " a late Medieval church of exceptionally simple character " . Cadw ( the Welsh Government body responsible for the built heritage of Wales and the inclusion of Welsh buildings on the statutory lists ) also notes that despite its " very poor condition " , St Mary 's " is a virtually unaltered late Medieval building ( even retaining the original roof trusses ) and in its isolation , is characteristic of many churches on the island . " 
 St Mary <a href='null_genetive' title='1'><mark>'s</mark></a><a href='got' title='2'><mark>has</mark></a> national recognition and statutory protection from alteration as it <a href='been_done' title='3'><mark>has</mark></a> been designated as a Grade II listed building – the lowest of the three grades of listing , designating " buildings of special interest , which warrant every effort being made to preserve them " . It was given this status on 12 May 1970 and <a href='been_done' title='4'><mark>has</mark></a> been listed because it <a href='drop_aux' title='5'><mark>is</mark></a>" a late Medieval church of exceptionally simple character " . Cadw ( the Welsh Government body responsible for the built heritage of Wales and the inclusion of Welsh buildings on the statutory lists ) also <a href='uninflect' title='6'><mark>notes</mark></a> that despite its " very poor condition " , St Mary <a href='null_genetive' title='7'><mark>'s</mark></a>" is a virtually unaltered late Medieval building ( even retaining the original roof trusses ) and in its isolation , <a href='drop_aux' title='8'><mark>is</mark></a>characteristic of many churches on the island . " 
St Mary  got national recognition and statutory protection from alteration as it done been designated as a Grade II listed building – the lowest of da three grades of listing , designating " buildings of special interest , which warrant every effort being made to preserve them " . It was given dis status on 12 May 1970 and done been listed bc it " a late Medieval church of exceptionally simple character " . Cadw ( the Welsh Government body responsible fa the built heritage of Wales and the inclusion of Welsh buildings on tdastatutory lists ) also note that despite its " very poor condition " , St Mary  " is a virtually unaltered late Medieval building ( even retaining the original roof trusses ) and in its isolation , characteristic of many churches on thdasland . "