The museum farms in the «Norwegian Farm» project are very dissimilar. Their situation in different parts of the country brings with it considerable variation as regards land use and building stiles. The farms were primarily run as family concerns, keeping domestic animals and gathering fodder. A common feature is that the farm and agricultural activity were never sufficient to feed the family, and that additional income and/or work outside the farm were necessary. Most of the farms have been too small and difficult to run to allow for modern practice and for investment to be profitable. The farms therefore became, to a large extent, «frozen» in time. Thus, they document living conditions, farm practices and related cultural environments and landscapes that have otherwise vanished. In addition to learning about the agricultural practices of earlier times, the museum farms are important for studying ecological processes that are related to earlier forms of farming. This knowledge is decisive for the preservation of vulnerable and threatened species in today’s cultural landscape. The museum farms can be a source of research in various fields, they are central in the dissemination of knowledge and they have high value as an experience.