Thurii, called also by some Latin writers Thūrium, and later in Roman times also Cōpia and Cōpiae, was an ancient Greek city situated on the Gulf of Taranto, near or on the site of the great renowned city of Sybaris, whose place it may be considered as having taken. The ruins of the city can be found in the Sybaris archaeological park near Sibari in the Province of Cosenza, Calabria, Italy.

Sybaris was an important ancient Greek city situated on the coast of the Gulf of Taranto in modern Calabria, Italy.