San Marino is divided into the following nine municipalities, known locally as castelli (meaning "castles").
The territory of San Marino (61 sq. km/24 sq. m) is mostly hilly country with Mount Titano in the center. It was founded, according to tradition in 301 A.D. Legend has it that a master stone-cutter, Marinus, left is native island and came to Mount Titano to establish a small community of Christians anxious to escape the persecutions of the emperor Diocletian.
The City of San Marino, also known simply as San Marino, is the capital city of the Republic of San Marino on the Italian peninsula, near the Adriatic Sea. The city has a population of 4,493. It is on the western slopes of San Marino's highest point, Monte Titano.