The megas adnoumiastēs (Greek: μέγας ἀδνουμιαστής) was a mid-level official of the Byzantine Empire during the Palaiologan period.
[1] The few surviving records that mention the title only contain references to megaloi adnoumiastai, and not to simple holders of the office of adnoumiastēs.
[1][3] Rodolphe Guilland suggested that he may have been the successor of the epi tōn basilikōn oplōn ("the one in charge of the imperial arms"), attested under Alexios III Angelos (r. 1195–1203), but admitted the lack of any firm evidence to that end.
[1] However, the few existing documentary sources show the holders of the office dealing with the administration of land grants and relevant disputes, in a role similar to that of an apographeus.
[8] According to Pseudo-Kodinos, his uniform was typical of the mid-level courtiers: a gold-embroidered skiadion hat, a plain silk kabbadion, a skaranikon (domed hat) covered in golden and lemon-yellow silk and decorated with gold wire and images of the emperor in front and rear, respectively depicted enthroned and on horseback.