The King's Mirror, an anonymous thirteenth-century Norwegian text, is structured as a didactic dialogue between a wise father and his inquiring son. The work is traditionally divided into sections addressing different societal orders, beginning with the practical and scientific education required for a successful merchant, including navigation, arithmetic, and international trade customs.
The narrative then transitions to the royal court, detailing the organization of the king's household, the hird, and the strict rules of courtesy, speech, and dress expected of courtiers. This section reflects a surprisingly refined medieval court culture influenced by both native Norse traditions and broader European chivalric ideals.
A central load-bearing theme of the work is the divine origin of kingship and the nature of royal authority. Drawing on biblical precedents and historical conflicts within Norway, the author argues that kings rule by divine dispensation and possess supreme judicial authority, even over the church and traditional sanctuaries. This defense of strong monarchy mirrors the political manifestos of King Sverre and anticipates later European political theory.
The text also includes extensive digressions on physical science and geography, showcasing an open-minded intellectual curiosity uncharacteristic of many medieval writers. The author discusses the spherical shape of the earth, meteorological phenomena like the northern lights, tidal movements, and the natural wonders and fauna of Iceland, Ireland, and Greenland.
Throughout the work, the author emphasizes moderation, obedience, and the preservation of a good reputation. The narrative concludes with reflections on the duties of a just king, the complexities of judicial sentencing, and the catastrophic impact of civil war and joint kingship on national morals.