Julian (Iouliane) Chrysostomides (Greek: Ιουλιανή Χρυσοστομίδη; 21 April 1928 – 18 October 2008) was a Greek historian of Istanbul. She lectured at Royal Holloway, University of London for nearly 30 years, and was instrumental in establishing it as a centre of Byzantine studies. She served for ten years as director of the Hellenic Institute at Royal Holloway, University of London, transforming it into a centre for interdisciplinary research into Greek and Byzantine history.