The historic village of Mommialla, which arose near some thermal water outcrops, has been known since before the year 1,000, when it is mentioned under the name Mumianula in a deed of agricultural grant from the bishop of Volterra.

Traces of it can be found in maps drawn by Leonardo da Vinci, it lived off the traffic of the Via del Sale and its thermal waters but during the twentieth century it was abandoned, a victim of marauders and looters.

Recently most of the buildings have been recovered, as has the small Church of San Frediano of which the first records appear in 1258.