This course for undergraduates and graduate students is an introduction to the rich Celtic literature and mythology of medieval Europe, concentrating primarily on texts in Old Irish and Middle Welsh. We may also read selected Celtic Latin writings. All readings will be in translation; I will offer some introduction to Old Irish and Middle Welsh languages for graduate students in some additional class meetings. Medieval Celtic literature has long been renowned for its lush use of magic and adventure, humor and horror, Medieval Ireland and Wales also had a relatively benign view of their pre-Christian past, so fascinating stories relating to myth and pre-Christian belief have come down to us. We will read dream visions, voyages to the Otherworld, sagas of war and adventure and magic animals, love stories, lyric poetry, tales of bards, magic, and wizards, and much more. Our texts will include the epic of the Irish hero CThe Mabinogi. We will learn about Irish runic writing (ogham). We may also spend some time working with later Irish folklore sources and the later, post-medieval reception of Celtic myth and literature.