Fontana del Nettuno, Piazza del Popolo

Piazza del Popolo is a large urban square in Rome. The name in modern Italian literally means "People's Square", but historically it derives from the poplars (populus in Latin, pioppo in Italian) after which the church of Santa Maria del Popolo, in the northeast corner of the piazza, takes its name. The piazza lies inside the northern gate in the Aurelian Walls, once the Porta Flaminia of ancient Rome, and now called the Porta del Popolo. This was the starting point of the Via Flaminia, the road to Ariminum (modern-day Rimini) and the most important route to the north. At the same time, before the age of railroads, it was the traveller's first view of Rome upon arrival. For centuries, the Piazza del Popolo was a place for public executions, the last of which took place in 1826.

The Flaminio Obelisk (Italian: Obelisco Flaminio) is one of the thirteen ancient obelisks in Rome, Italy. It is located in the Flaminio quarter on Piazza del Popolo. It is 24 m (67 ft) high and with the base and the cross reaches 36.50 m (100 ft).

The Porta del Popolo, or Porta Flaminia, is a city gate of the Aurelian Walls of Rome that marks the border between Piazza del Popolo and Piazzale Flaminio.

Santa Maria dei Miracoli and Santa Maria di Montesanto are two churches in Rome. They are located on the Piazza del Popolo, facing the northern gate of the Aurelian Walls, at the entrance of Via del Corso on the square. The churches are often cited as "twin", due to their similar external appearance: they have indeed some differences, in both plan and exterior details. Looking from the square, the two churches define the so-called "trident" of streets departing from Piazza del Popolo: starting from the left, Via del Babuino, Via del Corso and Via di Ripetta. The first two are separated by Santa Maria in Montesanto, the latter by Santa Maria dei Miracoli. The origin of the two churches traces back to the 17th-century restoration of what was the main entrance to the Middle Ages and Renaissance Rome, from the Via Flaminia (known as Via Lata and Via del Corso in its urban trait). Pope Alexander VII commissioned the monumental design of the entrance of Via del Corso to architect Carlo Rainaldi. This included two churches with central plans, but the different shapes of the two areas available forced deep modifications to the projects. Both were financed by cardinal Girolamo Gastaldi, whose crest is present in the two churches.

The Parish Basilica of Santa Maria del Popolo (Italian: Basilica Parrocchiale Santa Maria del Popolo) is a titular church and a minor basilica in Rome run by the Augustinian order. It stands on the north side of Piazza del Popolo, one of the most famous squares in the city. The church is hemmed in between the Pincian Hill and Porta del Popolo, one of the gates in the Aurelian Wall as well as the starting point of Via Flaminia, the most important route from the north. Its location made the basilica the first church for the majority of travellers entering the city. The church contains works by several famous artists, such as Raphael, Gian Lorenzo Bernini, Caravaggio, Alessandro Algardi, Pinturicchio, Andrea Bregno, Guillaume de Marcillat and Donato Bramante.

The Cerasi Chapel or Chapel of the Assumption (Italian: Cappella Cerasi, Cappella dell'Assunta) is one of the side chapels in the left transept of the Basilica of Santa Maria del Popolo in Rome. It contains significant paintings by Michelangelo Merisi da Caravaggio and Annibale Carracci, two of the most important masters of Italian Baroque art, dating from 1600–1601.

The Mellini or Saint Nicholas of Tolentino Chapel (Italian: Cappella Mellini, Cappella di San Niccolò da Tolentino) is the third chapel on the left-hand side of the nave in the Church of Santa Maria del Popolo in Rome. The chapel contains several funeral monuments of the members of the Mellini family among them the works of Alessandro Algardi and Pierre-Étienne Monnot.

The Chigi Chapel or Chapel of the Madonna of Loreto (Italian: Cappella Chigi or Cappella della Madonna di Loreto) is the second chapel on the left-hand side of the nave in the Basilica of Santa Maria del Popolo in Rome. It is the only religious building of Raphael which has been preserved in its near original form. The chapel is a treasure trove of Italian Renaissance and Baroque art and is ranked among the most important monuments in the basilica.

The Montemirabile or Saint John the Baptist Chapel, otherwise the Baptistery (Italian: Cappella Montemirabile, Cappella di San Giovanni Battista, Cappella del battistero) is the first side chapel in the left aisle in the Basilica of Santa Maria del Popolo.

The Theodoli Chapel or Chapel of Saint Catherine «del Calice» (Italian: Cappella Theodoli, Cappella di Santa Catarina del Calice) in the Basilica of Santa Maria del Popolo in Rome is an important monument of Roman Mannerism. Although less known than some of the other side chapels of the same church it is a major work in the oeuvre of Giulio Mazzoni. The chapel opens at the end of the left arm of the transept next to the famous Cerasi Chapel.

The Cybo-Soderini Chapel (Italian: Cappella Cybo-Soderini) or the Chapel of the Crucifixion (Italian: Cappella del Crocifisso) is a side chapel of the Basilica of Santa Maria del Popolo, Rome. Its most important works of art are the frescos of a Flemish artist, Pieter van Lint from c. 1636-37.

The Basso Della Rovere or Saint Augustine Chapel (Italian: Cappella Basso Della Rovere or Cappella di Sant'Agostino) is located in the south aisle of the basilica of Santa Maria del Popolo in Rome. This is the third side chapel from the counterfaçade and was dedicated to St. Augustine. The cycle of beautiful quattrocento frescoes was executed by Pinturicchio and his workshop.