The Byzantine citadel was erected during the reogn of Justinian (527-565).
See:
- Richard Stillwell, William L. MacDonald, Marian Holland McAllister, Stillwell, Richard, MacDonald, William L., McAlister, Marian Holland ed. : The Princeton encyclopedia of classical sites, Princeton, N.J. Princeton University Press. 1976 - http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0006:entry=ammaedara