Castelfranco di Sotto is a comune in the Province of Pisa in the Italian region Tuscany, located about 40 kilometres west of Florence and about 30 kilometres east of Pisa.
Castelfranco di Sotto borders the following municipalities: Altopascio, Bientina, Fucecchio, Montopoli in Val d'Arno, San Miniato, Santa Croce sull'Arno, Santa Maria a Monte.
Wikipedia https://en.wikipedia.org/wiki/Castelfranco_di_Sotto
Coordinates 43°41'58.975" N 10°44'42.64" E
