The term 'Ancient Norse Work' refers to the Edda, a collection of Old Norse poems and stories from the 13th century. It is an important source of information about Norse mythology, culture, and literature. The Edda is divided into two parts: the Poetic Edda and the Prose Edda. The Poetic Edda contains traditional mythological and heroic poems, while the Prose Edda is a handbook for skaldic poetry.