Gesdao
Gesdao or GESDAONE, as it appears in the oblique case in the Itin. Jerusalem; Gascido in the Table, which D'Anville read Gadao. The Jerusalem Itin. places it on a road from Brigantio (Briançon) to Susa: and it makes 10 M. P. from Brigantium to Gesdao, and 9 from Gesdao to Mutatio ad Marte. The Antonine Itin. makes 18 M. P. from Brigantio to Ad Martis, and omits Gesdao. The Table makes 6 M. P. from Brigantio to Alpis Cottia (Mont Genèvre), and then 5 M. P. to Gascido, and 8 from Gascido to Ad Martis. All these numbers agree pretty well, and by following the road from Brianon the position thus determined seems to be Cesano or Sezano.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.