The Republic of San Marino occupies 61 square kilometers on Mount Titano, a 739-meter peak in the Apennine Mountains completely surrounded by Italian territory. The entire historic center and Mount Titano received UNESCO World Heritage designation in 2008. The capital, Città di San Marino, sits at the mountain's summit. Serravalle holds the largest population among the nine municipalities, each called a castello. Borgo Maggiore functions as the second largest town. The remaining six municipalities are Domagnano, Faetano, Fiorentino, Montegiardino, Chiesanuova, and Acquaviva. Montegiardino has the smallest land area and population count.
Three medieval fortresses mark the ridge of Mount Titano and appear on the national flag and coat of arms. Guaita is the oldest fortress, with construction beginning in the 11th century. The structure served as a prison from the 1400s until 1975. Cesta, the second tower, sits at the highest elevation point at 756 meters above sea level. This fortress houses the Museum of Ancient Weapons, which displays over 500 weapons dating from the medieval period through the 19th century. Montale, the third tower, remains the smallest and is not open for interior visits. A walking path connects all three towers along the mountain ridge.
Palazzo Pubblico serves as the seat of government and the official residence of the Captains Regent, who are the two heads of state. The current building was constructed between 1884 and 1894 by architect Francesco Azzurri. The structure replaced an earlier government house called Casa del Comune from the 1400s. Piazza della Libertà extends in front of Palazzo Pubblico. The square contains the Statue of Liberty, sculpted by Stefano Galletti and installed in 1876. The Changing of the Guard ceremony occurs in the square during summer months from June through September.
The Basilica of San Marino houses the relics of Saint Marinus, the Christian stonemason who according to tradition founded the republic on September 3, 301 AD. The current basilica was built between 1826 and 1838 in neoclassical style by Antonio Serra, replacing a 7th-century Romanesque church. The facade features 16 Corinthian columns. Seven altars fill the interior. The skull and a portion of the skeletal remains of Saint Marinus rest beneath the main altar in a silver reliquary. The Church of San Pietro dates to the same 7th-century period as the original basilica and stands in a different location in the capital.
The Convent of San Francesco contains a church, cloister, and art gallery. The complex dates to 1361. The art gallery opened in 1966 and displays paintings from the 14th through 17th centuries, primarily by artists from the Emilia-Romagna and Marche regions of Italy. Works include pieces attributed to Jacobello di Bonomo, Neri di Bicci, and Guercino. The Church of San Quirino in Borgo Maggiore was built in 1549 and contains frescoes from the same century.
The State Museum opened in 1899 in Palazzo Pergami, then moved to its current location in Palazzo Pergami-Belluzzi in 1982. The collection contains over 5,000 objects. Archaeological artifacts include Etruscan bronzes from the 7th century BC, Roman coins, and ceramics. The pinacoteca section displays paintings from the 13th through 19th centuries. Egyptian artifacts occupy one section. The numismatic collection contains coins minted in San Marino since 1864 and commemorative issues. The Titanus Museum presents natural history specimens including fossils, minerals, and taxidermied animals found in the Mount Titano region.
Mount Titano Nature Reserve protects the mountain's flora and fauna. Oak and hornbeam trees dominate the lower elevations. Mediterranean scrubland appears at higher elevations. Peregrine falcons nest on the cliff faces. The Ausa River forms the northern border with Italy. The San Marino River, also called the Marano, flows through the southern portion of the territory. Cava dei Balestrieri is a former quarry where stone was extracted for building construction.
San Marino's crossbow tradition extends back to the medieval period. The San Marino Crossbow Corps, established formally in 1956 but tracing its roots to earlier militia organizations, competes in international tournaments. The Corps performs demonstrations during national celebrations. Medieval Days festival occurs annually in the capital and includes costumed parades, archery exhibitions, and historical reenactments. Specific dates and programming vary by year.