J. R. R. Tolkien was attracted to medieval literature, and made use of it in his writings, both in his poetry, which contained numerous pastiches of medieval verse, and in his Middle-earth novels where he embodied a wide range of medieval concepts.
Tolkien's prose adopts medieval ideas for much of its structure and content. The Lord of the Rings is interlaced in medieval style. The Silmarillion has a medieval cosmology. The Lord of the Rings makes use of many borrowings from Beowulf, especially in the culture of the Riders of Rohan, as well as medieval weapons and armour, heraldry, languages including Old English and Old Norse, and magic.