My research has focused on church archaeology in Scandinavia with different perspectives on Medieval church architecture, e. g. church building and economy, vaults and economy, church architecture and demography, the fortified or multi functional churches and the crusades on the Baltic Sea, churches and symbolism, churches and centrality, reconstructions of churches, churches as cultural heritage.

The research has also focused on urban topography (Tønsberg), central concepts (the Middle Ages, Romanesque, Gothic, society, noblemen, Viking, Modernity, heritage, central location and central place) and pseudo- or alternative archaeology (the round churches of Bornholm, ley lines, sacred geometry and so called "trelleborgs") and the development of Historical archaeology as a subject since the 17th century.

In recent years I have been interested in questions concerning memory, memorials and monuments, canonization, heritage and World heritage and I have conducted studies on memorials of archaeological finds and excavations in Denmark, also Early Modern memorials in the county of Visingsborg in Sweden and the movement of rune-stones, e.g. the Lundagård-stone, and memorials of the Reunification of Southern Jutland with Denmark in 1920.

Recently I have studied the meaning of heritage on a global scale using World Heritage sites as examples in the monograph "Heritopia: World Heritage and modernity" (2021).