The City of San Marino is the capital of the Republic of San Marino, one of the world's oldest republics. Located on the slopes of Mount Titano, it is known for its medieval architecture and stunning views. The city is home to several historic sites, including the Guaita, the oldest of the three towers that overlook the city. San Marino has a population of around 4,000 residents and covers an area of just over 61 square kilometers. The city is a UNESCO World Heritage site, recognized for its cultural significance and well-preserved historical structures, making it a popular destination for tourists.