Sweden's medieval churches are often painted inside. These murals are sometimes well preserved, other times fragmentary and in poor condition. The project participants, with a solid background from the Swedish National Heritage Board, the Nordic Museum and the Swedish Museum of Natural History, have previously carried out many advanced analyses of the unique cultural treasure that the medieval church paintings represent. In particular, church murals have been studied in Uppland, Skåne and Gotland. We now wish to extend these studies to medieval churches in Norrland, whose murals have never before been examined by chemical analysis. The working group wishes primarily to analyze color pigments and compare the results with previous data produced by ourselves or by other researchers on the continent. However, Norrland is very large, which means that in this first study we limit ourselves to medieval churches on the east coast of Norrland. We have chosen three churches in Hälsingland (Trönö old church, Enånger and Hälsingtuna churches), two in Medelpad (Alnö old church and the medieval church in Liden) and one in Ångermanland (Grundsunda). We will also try to draw conclusions about the origin of the pigments.