Konungs skuggsjá is a Norwegian didactic text in Old Norse from around 1250, an example of speculum literature that deals with politics and morality. It was originally intended for the education of King Magnus Lagabøte, the son of King Håkon Håkonsson, and it has the form of a dialogue between father and son. The son asks, and is advised by his father about practical and moral matters, concerning trade, the hird, chivalric behavior, strategy and tactics. Parts of Konungs skuggsjá deals with the relationship between church and state.

The medieval genre of speculum literature, popular from the twelfth through the sixteenth centuries, was inspired by the urge to encompass encyclopedic knowledge within a single work. However, some of these works have a restricted scope and function as instructional manuals. In this sense, the encyclopedia and the speculum are similar but they are not the same genre.