context: Norse mythology was primarily associated with the Old Norse spoken language, a northern Germanic language that was spoken by Scandinavians in the European Middle Ages, and is the ancestor of modern Scandinavian languages. Much of this ancient Norse book originated in Iceland, where its narrative, which originated from pre-Christian indigenous communities, was collected and documented in various manuscripts. They were originally made in the 5th Century. Among these books were Prose Edda, composed by Snorri Sterlson in the 5th century, and Poetic Edda, a compilation of poems by early traditional subjects. [1]
question: When was the Norse mythology written?