Sulmo
Sulmo (Sermoneta), an ancient city of Latium, mentioned only by Pliny (3.5. s. 9) among those which were extinct in his time, and incidentally noticed by Virgil. (Aen. 10.517.) It is in all probability the same place with the modern Sermoneta, which stands on a hill between Norba and Setia, looking over the Pontine Marshes.
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.