Castellina Marittima is a comune in the province of Pisa in the Italian region Tuscany, located about 70 km southwest of Florence and about 35 km southeast of Pisa. The territory of Castellina Marittima borders the following municipalities: Cecina, Chianni, Riparbella, Rosignano Marittimo, Santa Luce. For centuries Castellina has been an important source for alabaster.