Pottery kilns at Filsö

The northern pottery kiln, Structure II, as seen from the southeast. (12th. century AD). Notice the peat cap, the slightly dug-in position, the layers marked by fire, and the scattered stones. - Photo: Ole Vejbaek.
The southern pottery kiln, Structure III, under excavation as seen from the south. (12th. century AD). The kiln shows signs of having been opened on the far side, and loose turves are just visible in the background. - Photo: Ole Vejbaek.
For further detail, see Vejbaek, O., "Agre og miler ved Filsö", Kuml, 2005, pp. 187-124.