Here you can find the answer http://www.libertas.sm/Storia_generale/In/History_San_Marino_1.htm
San Marino is a completely landlocked country in Italy.
City of San Marino
None it is landlocked
San Marino is the oldest nation in the world, it received independence from the Roman Empire and has far been around longer than the country of Italy that surrounds it.
83 years, actually the highest in the world!