Rural Settlements in Medieval Norway, AD 400-1400

Courtesy Medievalists.net:

"In the 5th and 6th centuries the three aisled longhouse with a byre and a living section appears to dominate on rural settlements in all regions. From the 7th century onwards the diversity is greater. In northern Norway the longhouse is still built in the 10th century. In eastern Norway the function fragmentation of the longhouse advances step by step until the domination of the two roomed timbered livinghouse from the 12th century onwards. In western Norway this fragmentation also occurs, but the longhouse without a byre also continues to be built, probably until modern times. Alterations in building techniques probably played a limited role in these developments."  The full article may be read at Ruralia.