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Heimskringla, meaning'the world circle', is a 13th-century collection of sagas authored by Snorri Sturluson. It recounts the history of Norse kings from ancient times to the mid-13th century. Written in Old Norse, Heimskringla is considered one of the most important sources of Norse mythology, culture, and history, providing valuable insights into the lives of influential rulers and their role in shaping the Scandinavian region.