Uranius the Historian is known only from a single citation in the 6th-century geographical lexicon Ethnica by Stephen of Byzantium. Stephen offers no biography, but the citation’s content and context place Uranius tentatively in the 3rd or 4th century CE. He was a Greek author whose work indicates a focus on the Arabian Peninsula.

His sole attested work is the Arabica, a lost geographical and historical treatise on Arabia. Stephen of Byzantium cites it for the place-name Nakla, providing the only evidence of its existence.

Uranius’s significance rests on his composition of a dedicated Greek work on Arabia, a region of growing importance to the late Roman Empire. His Arabica represents a link in the tradition of Greek geographical writing about the East, and its citation centuries later confirms it was considered a credible source in Byzantine scholarship.