Border: Entirely surrounded by Italy Area: 39 km* Est. Gross Domestic Product: $1.807 billion (San Marino) / $2.629 trillion (Italy)* The boundary between San Marino and Italy is evidence of the persistent independence of one of the oldest and smallest republics in the world. Being a landlocked enclave within Italy, this microstate is completely surrounded by Italian territory and enjoys a special geopolitical status. Its limits, which pass through the picturesque areas of Emilia Romagna and Marche, have hardly altered since the sixteenth century, demonstrating an amazing degree of historical continuity.