Start your tour in Piazza di Spagna, a masterpiece of the 18th century. Learn about the square's  irregular shape and the French Church Trinita dei Monti. Find the most prestigious here, before you move on to the famous Trevi Fountain. Marvel at the huge baroque confection of thrashing horses, splashing water, and striding Tritons. Before leaving, throw a coin in the fountain to ensure your return to the Eternal City! Move on to find Piazza Montecitorio, home to the 6th century Obelisk of Montecitorio, originally from Heliopolis in Egypt. Continue to the Pantheon of ancient Rome, built as a temple to all the gods of Olympus. Head to Piazza Navona, the Stadium of Domitian, built in 85 A.D. to accommodate the athletic games. Piazza Navona is the pride of Baroque Rome, with architectural elements and sculptures by masters such as Gian Lorenzo Bernini, Francesco Borromini and Girolamo Rainaldi. Complete your tour at Campo de' Fiori, home to a colorful local market of groceries since 1869. It had previously hosted performances, horse racing and for centuries Campo de 'Fiori was the main stage for public executions!