Beinecke Library Exhibition. 15th century girdle book. Boethius’ Consolations of Philosophy, likely copied in England in the fifteenth century, was re-bound at some point later in the fifteenth century as a “girdle-book,” to be read while hanging from the waist.
Aether/Omega means: "(In ancient and medieval philosophy) The fifth essence or element, ether, supposed to be the CONSTITUENT MATTER OF THE HEAVENLY BODIES, the others being air, fire, earth, and water." Yup.
The below image is a painting called “Philosophy Presenting the Seven Liberal Arts to Boethius” from the manuscript The Consolation of Philosophy. It is from around 1450, at the end of the era of Medieval fashion and just before the Renaissance started changing clothing. The women wear a variety of gown styles, including sideless surcoats over cotehardies and the v-necked, high-waisted “Burgundian” gown. They all wear either wimples or hennins in different fashions, some veiled.