Province of Livorno
The current province descends from the Grand Duchy, while its territories are part of the former Maritime Republic of Pisa. In 1925, the municipalities of Bibbona, Campiglia Marittima, Castagneto Carducci, Cecina, Collesalvetti, Piombino, Rosignano Marittimo, Sassetta, and Suvereto were transferred to the Province of Livorno, and at the same time the municipalities of Castelfranco di Sotto, Montopoli in Val d'Arno, San Miniato, Santa Croce sull'Arno, and Santa Maria a Monte were acquired by the Province of Florence. In 1938, the comune of Castellina Marittima bought a small slice of the territory of the municipality of Cecina, part of the province of Livorno, which was attributed to an administrative error.