Where does shakespeare twelfth night take place?

Setting (place) · The mythical land of Illyria (Illyria is a real place, corresponding to the coast of present-day Albania—but Twelfth Night is clearly set in a fictional kingdom rather than a real one

Twelfth Night is set in the imaginary Dukedom of Illyria. Illyria happens to correspond to a place on the Adriatic coast, a place most Elizabethans knew nothing about and where most Londoners had never been. This distant and mysterious sounding place makes it a perfect setting for Shakespeare to stage his play.