Original: Rosignano Marittimo is a comune ( municipality ) in the Province of Livorno in the Italian region Tuscany , located about 80 km southwest of Florence and about 20 km southeast of Livorno .
Simplified: The comune of Rosignano Marittimo contains the frazioni of : Castiglioncello , Rosignano Solvay , Vada , Castelnuovo della Misericordia , Gabbro , and Nibbiaia .