Old English literature refers to poetry and prose written in Old English in early medieval England, from the 7th century to the decades after the Norman Conquest of 1066, a period often termed Anglo-Saxon England. The 7th-century work Cædmon's Hymn is often considered as the oldest surviving poem in English, as it appears in an 8th-century copy of Bede's text, the Ecclesiastical History of the English People. Poetry written in the mid 12th century represents some of the latest post-Norman examples of Old English. Adherence to the grammatical rules of Old English is largely inconsistent in 12th-century work, and by the 13th century the grammar and syntax of Old English had almost completely deteriorated, giving way to the much larger Middle English corpus of literature.

In prosody, alliterative verse is a form of verse that uses alliteration as the principal device to indicate the underlying metrical structure, as opposed to other devices such as rhyme. The most commonly studied traditions of alliterative verse are those found in the oldest literature of the Germanic languages, where scholars use the term 'alliterative poetry' rather broadly to indicate a tradition which not only shares alliteration as its primary ornament but also certain metrical characteristics. The Old English epic Beowulf, as well as most other Old English poetry, the Old High German Muspilli, the Old Saxon Heliand, the Old Norse Poetic Edda, and many Middle English poems such as Piers Plowman, Sir Gawain and the Green Knight, Layamon's Brut and the Alliterative Morte Arthur all use alliterative verse.