What is the capital of sicily

The answer is: Palermo.

Some context:

Sicily is not a country, but it is an autonomous region, which means that it can decide over some local issues.

The region of Sicily is called Regione Siciliana.

The capital of the region is Palermo: this is the correct answer

Additionally, before the unification of Italy, when Sicily was independent (as the Kingdom, of Sicily), Palermo was its capital.