The Franks Casket (or the Auzon Runic Casket) is a small whalebone chest, carve with narrative scenes in flat two-dimensional low-relief and inscribed with Anglo-Saxon runes. The casket is dateable from its pagan elements to the mid-seventh century CE (that is, during the height of the Heptarchy and the period of Christianization of England). The casket is densely decorated with images and interpreting the runic inscriptions has occupied linguists. The casket is now on display at the British Museum. Generally reckoned to be of Northumbrian origin, it is of unique importance for the insight it gives into secular culture in early Anglo-Saxon England.