Adam of Bremen, Gesta Hammaburgensis ecclesiae pontificum  IV, 26:   "Now we shall say a few words about the superstitions of the Swedes. That folk has a very famous temple called Uppsala, situated not far from the city of Sigtuna and Björkö. In this temple, entirely decked out in gold, the people worship the statues of three gods in such wise that the mightiest of them, Thor, occupies a throne in the middle of the chamber; Wotan and Frikko have places on either side. The significance of these gods is as follows: Thor, they say, presides over the air, which governs the thunder and lightning, the winds and rains, fair weather and crops. The other, Wotan -that is, the Furious--carries on war and imparts to man strength against his enemies. The third is Frikko, who bestows peace and pleasure on mortals. His likeness, too, they fashion with an immense phallus."