Przemysław Urbańczyk is Professor at the Cardinal Wyszyński University in Warsaw and in the Institute of Archaeology and Ethnology, Polish Academy of Sciences. He specializes in the medieval archaeology and history of Poland, East Central Europe, Scandinavia and the North Atlantic islands. His previous publications include Zdobywcy północnego Atlantyku (Conquerors of the North Atlantic) (2004) and Trudne początki Polski (Difficult Origins of Poland) (2008) which won the Klio prize for best history book of the year.