There are good reasons to assume that the author was Óláfr Þórðarson (d. 1259), nicknamed hvítaskáld "the White Poet", who was a nephew of Snorri Sturluson.
The Saga of Darren Shan | The Forsyte Saga | Saga | The Twilight Saga (film series) | The Twilight Saga: Breaking Dawn – Part 1 | Saga (band) | Orkneyinga saga | Óláfs saga Tryggvasonar | Laxdæla saga | Hell's Angels: The Strange and Terrible Saga of the Outlaw Motorcycle Gangs | Ynglinga saga | Saga Prefecture | Íslendinga saga | Excel Saga | Arita, Saga | Víglundar saga | Vanguard: Saga of Heroes | The Twilight Saga: New Moon | The Twilight Saga | Seafort Saga | SaGa (series) | Saga Domain | SaGa | saga | Roots: The Saga of an American Family | Illuga saga Gríðarfóstra | Eyrbyggja saga | Egils saga einhenda ok Ásmundar berserkjabana | Þorsteins saga Síðu-Hallssonar | The Sandman Saga |
About 1170, the Nordic Knytlinga saga reported a siege of Jomsborg by the Dano-Norwegian king Magnus (1043) and a campaign against that place by the Danish king Valdemar I (1170).