In Scandinavia and other parts of Europe, there is evidence of a variety of longhouse with bowed sides during the Viking period. The finest examples have been excavated at 11th-century Viking camps such as Trelleborg in southern Jutland. A reconstructed example there has walls made of halved tree trunks set in rows, with the curved face outwards as in stave churches. A series of angled posts around the outside acted as buttresses and gave additional support to the gabled roof with its curved ridge. The roof may have been covered in wooden shingles, thatch, or turf. There is considerable variation in boat-shaped houses, depending on function and location. Two British examples are a boat-shaped building in Hamwih and another in Bucken.