At which university did J.R.R. Tolkien begin teaching after leaving the University of Leeds?

After leaving the University of Leeds, J.R.R. Tolkien began teaching at the University of Oxford.

Tolkien worked at Leeds from 1920 to 1925, first as a reader and later as a professor of English language. In 1925 he moved to Oxford after being appointed Rawlinson and Bosworth Professor of Anglo-Saxon at Pembroke College. He remained associated with Oxford for most of his academic career.

Oxford provided the setting in which Tolkien developed both his scholarship and much of his fiction. He taught and researched Old English, Middle English, medieval literature, and historical linguistics. His academic interests strongly influenced the names, languages, genealogies, and literary textures of Middle-earth.

The wording can cause confusion because Tolkien held posts at specific Oxford colleges rather than at a separate university campus in the modern sense. He later became Merton Professor of English Language and Literature and held that chair until his retirement in 1959.