The history of the Republic starts in the year 301 A.D.

In the Republic of San Marino the cult of the Saint, the legendary founder of the Republic, is widespread and sincere. Indeed, it is this legend that has handed down to us the figure of Marino, the stonemason, arriving from the island of Arbe in Dalmatia, rising Mt. Titano to found a small community of Christians, persecuted for their faith by the Emperor Diocletian.

The area is known to have been inhabited since prehistoric times but only in the Middle Ages do we have news of the existence of a Monastery, a Parish and a Castle, together confirming the existence of an organized community at the peak of Mt. Titan.