Lexikon des Mittelalters

Historically the works range from Late Antiquity to about 1500, covering the Byzantine Empire and the Arab world .

In 2000, an electronic (standalone) edition of the Lexikon was published on CD-ROM by Brepols.

Holmes, in The English Historical Review, foresaw that the entire encyclopedia would be "a valuable reference work of a kind which medievalists hitherto lacked.

"[1] H. Chadwick, in The Journal of Theological Studies, called the lexicon "a necessary and valuable work of reference.

"[4] The CD-ROM edition was chosen as one of the "Selected Reference Books of 2001-2002" by College & Research Libraries.