Codanus Sinus
Codanus Sinus the sea to the east of the Chersonesus Cimbrorum (Jutland), which, as Pomp. Mela (3.4) states, is filled with islands, all of which belong to the modern kingdom of Denmark. It was therefore the southern part of the Baltic. According to Pliny (4.27) it extended north as far as the prom. Cimbrorum.
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.