What is the Tyrrenian Kingdom?

Think of a modern-day more hellenistic Italy but bigger and also with some spots of medieval England because of a cultural hiatus and a Renaissance afterwards. The native language is Italian with a lot of greek vocabulary. This nation is an automated happy communist republic, having been the millenarian monarchy peacefully overthrown since few years.

The Tyrrens are like Italians with much more sense of community unity than IRL, presenting also a lot of greek cultural characteristics. There are many immigrants from all over the world well integrated.