San Marino, officially the Republic of San Marino (), also known as the Most Serene Republic of San Marino (), is an enclaved microstate surrounded by Italy, situated on the Italian Peninsula on the northeastern side of the Apennine Mountains. Its size is just over , with a population of 33,562. Its capital is the City of San Marino and its largest city is Serravalle. San Marino has the smallest population of all the members of the Council of Europe. 

The country takes its name from Marinus, a stonemason originating from the Roman colony on the island of Rab, in modern-day Croatia. In 257 CE Marinus participated in the reconstruction of Rimini's city walls after their destruction by Liburnian pirates. Marinus then went on to found an independent monastic community on Monte Titano in 301 CE; thus, San Marino lays claim to be the oldest extant sovereign state as well as the oldest constitutional republic. 

San Marino is governed by the Constitution of San Marino ("Leges Statutae Republicae Sancti Marini"), a series of six books written in Latin in the late 16th century, that dictate the country’s political system, among other matters. The country is considered to have the earliest written governing documents, or constitution, still in effect.
Is it a peaceful republic?
an Marino lays claim to be the oldest extant sovereign state as well as the oldest constitutional republic. 
