The territory of San Giuliano is enriched by the presence of numerous sacred buildings dating to the last period of the Roman Empire and to the Middle Ages, among which there is the Parish of St. Mark, dating to the VIII-IX century and standing out in Rigoli.

The rise of Christianity in the area of San Giuliano had to face the hostility of the Barbarian populations that had settled the area after the fall of the Roman Empire. Therefore, the dating of the Parish of St. Mark is particularly revealing.
In effect, Charlemagne's coronation took place in 800 A.D. and his conversion to Christianity allowed the Church to carry out its first construction works in the areas traditionally hostile to this faith.
The Parish of St. Mark is the only church in the area to have a three-nave plant, since the Romanesque stile, which developed after the year 1000, had not influenced it yet. Inside, a baptismal font it still preserved and it reminds the original function of the parish.
As a matter of fact, it was certainly one of the first baptismal churches of the Pisan archbishopric.
According to documents, the territories around it were under the direct control of the German emperors Henry IV and Otto III. Both them and the numerous popes that came one after the other at that time, reiterated the legitimacy of the parish's jurisdiction exercised by the Pisan Bishop.
St. Mark's Parish shortly preceded the fate of San Giuliano, when the Florentines, led by the Count Bertoldo Orsini, besieged it and took it.
Nevertheless, this episode did not tarnish its prestige at all. In fact, at the time of the power shift in the Pisan country, the parish of St. Mark, with its centuries-old activity, obtained the two most recent parishes of Fiettole and Vecchiano, for a total of sixteen parishes that were added to those directly administered by the parish of Rigoli.
The parish has come to our days with its characteristics almost unaltered. Inside, it is possible to admire the above-mentioned baptismal font decorated with bas-reliefs, a circular processional painting with a vine-branch carved on the border.
Above the altar of the Virgin Mary, a XV-century painting is set. This is a work by the painter Turino Vanni from Rigoli.