Introduction: This thesis investigates how two regional museums, Tornedalens museum in Finland and Norrbottens museum in Sweden handles the cultural heritage of Tornedalen (Torne River Valley) and the tornedalian culture. The aim of the study is to understand how place, cultural heritage and nationality work together regarding visibility and dissemination of knowledge. The focus of this study surrounds the demarcations between the Finnish and Swedish side of Tornedalen, where the two regional museums with belonging archives are explored and compared.   Method: In this study, ten interviews with a total of 12 participants were conducted, five at Tornedalens museum and five att Norrbottens museum, as well as field studies at both museums. The participants hold positions as archivists, educators, antiquarians, archeologists and managers at the museums. The interviews were taped and transcribed, and notes were taken during the field studies.   Analysis: The theoretical and analytical framework consists of critical heritage discourse. Additional theoretical concepts are place, representation, identity, demarcations, narration and performativity.   Results: the two museums portrait and relate to the tornedalian region and culture in different ways. Tornedalens museum portrait the partition of Tornedalen into two separate nations, and how this affected the lives of people living in the region and does to this day. The museum also represents a narrative that does not divide Swedish tornedalians from Finnish tornedalians and uses Tornio River as a symbol of unity. At Norrbottens museum, this narrative is not represented. Here, the linguistic oppression that Swedish tornedalians, lantalaiset and kvens were subject to is highlighted, as well as questions concerning how people and cultures in Norrbotten are united and share a common history and cultural heritage.    This is a two-year master’s thesis in archival science and museology and cultural heritage science.