Sessites
Sessites (Sesia), a river of Gallia Transpadana, and one of the most important of the northern tributaries of the Padus. It flows beneath the walls of Vercellae (Vercelli), and joins the Padus about 16 miles below that city. Its name is noticed only by Pliny (3.16. s. 20) and the Geographer of Ravenna (4.36), who writes the name Sisidus.
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.