12th Century ancient architecture christian church Cornish cornwall England english Grade I Great Britain historical old religion St Enodoc steeple stone 3rd Century Burgh Castle field fort landmark norfolk Remains roman turrets walls graves graveyard religious roof shadow sunlight Sussex tiles tombs tombstones tower Abbey art capitals century cloisters courtyard France french heritage light mediaeval Moissac pillars romanesque sculpture 17th century Argolis battlements castle defence defense elements fortress Greece Morea nafplio Palamidi Peloponnese power ramparts stronghold venetian arch hill hilltop ruins background building dark Hopperstad medieval norway norwegian stave tar tarred texture Vik wooden