Jarl Wilhelm Erik Gallén, born 23 May 1908 in Helsinki, died 27 March 1990 in Helsinki, was a Finnish historian and Swedish-speaking professor in history at Helsinki University 1964-1975.
Career
His most noticed work is about the treaty of Nöteborg and the medieval eastern frontier of Finland Nöteborgsfreden och Finlands medeltida östgräns (1968). The second crusade he dates to the years of 1238 or 1239, which is more likely because that the papal bulla of crusade stems from 1237.
Views
One of Gallén"s thesis is that he holds it as unlikely that the Swedes made a crusade to Finland 1249-1250 from a political point of view, because of a serious power struggle with Norway at the time.