Levantia

"Levantia is a site for the social history of the Roman Empire and Near East, roughly between the ninth and thirteenth centuries. It explores this especially by means of practical reconstruction and experimentation. It also includes discussion of the issues of historiographic method and representation in public contexts."

The site contains information about costuming, daily life, the military, theoretical topics, and other subjects. It is a good source for those researching Byzantine, Rus, and similar personas.