Introduction to San Marino: San Marino is one of the smallest countries in the world, and the entire country is surrounded by Italy. According to legend, in the second half of the 3rd century AD, the stonemason Marino went to this land to make a living by quarrying alone because he opposed the feudal rule at that time, and gradually formed a "stonemason commune". In memory of him, later generations named the country the Republic of San Marino.