The Field of Mars, or Campus Martius, was a vast district of Ancient Rome, an area whose importance was demonstrated through the presence of temples, baths, and commemorative structures like the Ara Pacis. The current day Field of Mars designates an area of Rome’s historic center with well-known sites such as the Pantheon, Campo de’ Fiori, and Piazza Navona, as well as numerous Renaissance and Baroque palaces, piazzas, and churches. This leisurely walking tour through the historical center, where Romans have been living, worshiping, and gathering for more than 2000 years, can be tailored to focus on a specific theme or art historical period.