Valhalla: Is The London Bridge Nursery Rhyme Based On The Viking Attack? by Ziad Shihab/ March 13th, 2022 Valhalla: Is The London Bridge Nursery Rhyme Based On The Viking Attack? https://screenrant.com/vikings-valhalla-london-bridge-nursery-rhyme-attack-inspiration/amp/Dark theories exist for this nursery rhyme.