What does this sentence mean?

Sole: Sun

Di: Italian preposition? Meaning? ... (the component after di is the subject)

Orca is located in the province of Siena in Tuscany, central Italy. Since the Middle Ages, Orca, a border area, has been the only place for pilgrims to go to Rome. There are countless guest houses, hotels, hospitals and post stations in the valley. For centuries, it has received a large number of pilgrims and tourists, facilitating their travel. Until now, you can still see the ruins of Arcimbaldo Hospital, Briccole House, hotels on Olca Bridge, etc. There are also the remains of Scala Post Station, Podrina Post Station, Ricols Post Station and Radi Cofani Post Station built by Bonn Daretti. At that time, many defensive buildings such as castles and towers were gradually built along the ancient road of Jeanne, France, and some local churches, monasteries and other buildings with characteristics of various historical periods were gradually developed.

This valley consists of five places, namely, San Cordocha, Castillo Cordocha, Radhikafani, Pian and Montel, where there are many ancient buildings and works of art in the Middle Ages and Renaissance. ?

In addition to its unique cultural value, Orca Valley is unique among the scattered towns and cottages. These huts were built by private individuals or under the auspices of the church, and they were connected together to form an area with comprehensive characteristics of history, art, architecture and environment. These most fascinating towns are Montecarlo, Corsnano, Castruzzio, Leto, Spada, Rocca Dorcea, CampPiria, Castillo Dorcea's Rio Padol and Vivo in pienza, as well as Vinoni and Barney Ovino in San Quidocha.