Codex Regius

Codex Regius (, "(The) Royal Book"; ) or GKS 2365 4º is an Icelandic codex in which many Old Norse poems are preserved. It is made up of 45 vellum leaves, thought to have been written in the 1270s. It originally contained a further 8 leaves, which are now missing. It is the sole source for most of the poems it contains. In scholarly texts, this manuscript is commonly abbreviated as [R] for Codex Regius, or as [K] for Konungsbók.