The modius is a type of flat-topped cylindrical headdress or crown found in ancient Egyptian art and art of the Greco-Roman world. The name was given by modern scholars based on its resemblance to the jar used as a Roman unit of dry measure,[1][2] but it probably does represent a grain-measure, and symbolizing one's ability to learn new information by having an open mind with an empty cup. Serapis was the main idol/figurehead at the Library of Alexandria during the ancient Egyptian & Roman alliance.
The modius is worn by certain deities, including the Eleusinian deities and their Roman counterparts, the Ephesian Artemis and certain other forms of the goddess,[3]Hecate, and Serapis.[4] Personifications of Genius often wore the modius. On some deities it represents fruitfulness.[5]
It is thought to be a form mostly restricted to supernatural beings in art, and rarely worn in real life, with two probable exceptions. A tall modius is part of the complex headdress used for depictions of Egyptian royal women, often ornamented variously with symbols, vegetative motifs, and the uraeus.[6] It was also the distinctive headdress of Palmyrene priests.[7][8]
Head of a genius found at the Roman military camp Vindobona
^Judith Lynn Sebesta and Larissa Bonfante, The World of Roman Costume (University of Wisconsin Press, 2001), p. 245
^Irene Bald Romano, Classical Sculpture: Catalogue of the Cypriot, Greek, And Roman Stone Sculpture in the University Of Pennsylvania Museum of Archaeology and Anthropology (University of Pennsylvania Museum of Archaeology, 2006), p. 294.
^Joseph Eddy Fontenrose, Didyma: Apollo's Oracle, Cult, and Companions pp. 131–132.
^Brunilde Sismondo Ridgway, Hellenistic Sculpture: The Styles of ca. 331–200 B.C. (University of Wisconsin Press, 2001), p. 95.
^Bryan, "A Newly Discovered Statue of a Queen," p 36ff.; Paul Edmund Stanwick, Portraits of the Ptolemies: Greek Kings As Egyptian Pharaohs (University of Texas Press, 2002), p. 35 et passim.