The Ring Fort Gråborg on Öland, Sweden:

This paper concerns the secondary so-called inner and outer walls at the ancient ring fort of Graborg on Oland, Sweden. An ocular buildingarchaeological examination 1997–2002 led to the conclusion that these walls have a building technique and construction that gives reason to re-evaluate earlier interpretations regarding their age, function and rise. I argue that these secondarily built walls might represent the work of farmers or craftsmen clearing the area inside and surrounding the ring fort in order to facilitate farming after the prehistoric and medieval building phases. This might also be the reason we do not have any crop marks inside or outside Graborg today. The ocular examination 1997–2002 gave a chance to study walls, rows of stones, single stones, drained areas etc. linked to different building phases of Graborg, which will be commented upon, too.