The term 'Collection of Old Norse Poems' refers to the Edda, a collection of anonymous Icelandic poems and stories from the 13th century. It is divided into two parts: the Poetic Edda and the Prose Edda. The Poetic Edda contains mythological and heroic poems, while the Prose Edda is a handbook of poetics for skaldic poetry. Both parts are important sources for understanding Norse mythology and culture.