
The so-called Roman Castles are a group of comunes in the Metropolitan City of Rome. They are located a short distance south-east of the city of Rome, at the feet of the Alban Hills, in the territory corresponding to the Old Latium.

The so-called Roman Castles are a group of comunes in the Metropolitan City of Rome. They are located a short distance south-east of the city of Rome, at the feet of the Alban Hills, in the territory corresponding to the Old Latium.

The Alban Hills are the caldera remains of a quiescent volcanic complex in Italy, located 20 km (12 mi) southeast of Rome and about 24 km (15 mi) north of Anzio. The 950 m (3,120 ft) high Monte Cavo forms a highly visible peak the centre of the caldera, but the highest point is Maschio delle Faete approximately 2 km (1.2 mi) to the east of Cavo and 6 m (20 ft) taller. There are subsidiary calderas along the rim of the Alban Hills that contain the lakes Albano and Nemi. The hills are composed of peperino, a variety of tuff that is useful for construction and provides a mineral-rich substrate for nearby vineyards.

Albano Laziale is a comune in the Metropolitan City of Rome, on the Alban Hills, in Latium, central Italy. Rome is 25 kilometres (16 mi) distant. It is bounded by other communes of Castel Gandolfo, Rocca di Papa, Ariccia and Ardea. Located in the Castelli Romani area of Lazio. It is sometimes known simply as Albano.
Ariccia is a town and comune in the Metropolitan City of Rome, central Italy, 16 miles (25 km) south-east of Rome. It is in the Alban Hills of the Lazio (Latium) region and could be considered an extension of Rome's southeastern suburbs. One of the Castelli Romani towns, Ariccia is located in the regional park known as the "Parco Regionale dei Castelli Romani".
Marino is an Italian city and comune in Lazio, on the Alban Hills, Italy, 21 kilometres southeast of Rome, with a population of 37,684 and a territory of 26.10 square kilometres (10.08 sq mi). It is bounded by other communes, Castel Gandolfo, Albano Laziale, Rocca di Papa, Grottaferrata, and Ciampino. Marino is famous for its white wine, and for its Grape Festival, which has been celebrated since 1924.

Castel Gandolfo, colloquially just Castello in the Castelli Romani dialects, is a town located 25 kilometres (16 mi) southeast of Rome in the Lazio region of Italy. Occupying a height on the Alban Hills overlooking Lake Albano, Castel Gandolfo has a population of approximately 8,900 residents and is considered one of Italy's most scenic towns.

Cecchina is a town located approximately 30 km south-east of Rome in the Italian region of Lazio, in central Italy.

Ciampino is a city and comune in the Metropolitan City of Rome, Lazio, Italy. It was a frazione of Marino until 1974, when it became a comune; it obtained the city status in 2004 by a presidential decree.
Colonna is a comune (municipality) in the Metropolitan City of Rome in the Italian region Latium, located about 20 kilometres (12 mi) southeast of Rome, on the Alban Hills. With a population of some 4,300, it is the smallest of the Castelli Romani.
Frascati is a city and comune in the Metropolitan City of Rome Capital in the Lazio region of central Italy. It is located 20 kilometres (12 mi) south-east of Rome, on the Alban Hills close to the ancient city of Tusculum. Frascati is closely associated with science, being the location of several international scientific laboratories.

Genzano di Roma is a town and comune in the Metropolitan City of Rome, in the Lazio region of central Italy. It is one of the Castelli Romani, at a distance of 29 kilometres (18 mi) from Rome, in the Alban Hills.

Grottaferrata is a small town and comune in the Metropolitan City of Rome, situated on the lower slopes of the Alban Hills, 20 kilometres south east of Rome. It has grown up around the Abbey of Santa Maria di Grottaferrata, founded in 1004. Nearby communes include Frascati, Rocca di Papa, Marino and Rome.

Lake Albano is a small volcanic crater lake in the Alban Hills of Lazio, at the foot of Monte Cavo, 20 km (12 mi) southeast of Rome. Castel Gandolfo, overlooking the lake, is the site of the Papal Palace of Castel Gandolfo.

Lake Nemi is a small circular volcanic lake in the Lazio region of Italy 30 km (19 mi) south of Rome, taking its name from Nemi, the largest town in the area, that overlooks it from a height.

Lanuvio is a comune (municipality) in the Metropolitan City of Rome in the Italian region Latium, located about 30 kilometres (19 mi) southeast of Rome, on the Alban Hills.

Lariano is a comune (municipality) in the Metropolitan City of Rome in the Italian region Lazio, located about 35 kilometres (22 mi) southeast of Rome on the Alban Hills.
Marino is an Italian city and comune in Lazio, on the Alban Hills, Italy, 21 kilometres southeast of Rome, with a population of 37,684 and a territory of 26.10 square kilometres (10.08 sq mi). It is bounded by other communes, Castel Gandolfo, Albano Laziale, Rocca di Papa, Grottaferrata, and Ciampino. Marino is famous for its white wine, and for its Grape Festival, which has been celebrated since 1924.
Monte Compatri is a comune (municipality) in the Metropolitan City of Rome in the Italian region Latium, located about 20 kilometres (12 mi) southeast of Rome on the Alban Hills. It is one of the Castelli Romani.

Monte Porzio Catone is a comune (municipality) in the Metropolitan City of Rome in the central Italian region Latium, located about 20 kilometres (12 mi) southeast of Rome, on the Alban Hills.

Nemi is a town and comune in the Metropolitan City of Rome, in the Alban Hills overlooking Lake Nemi, a volcanic crater lake. It is 6 kilometres (4 mi) northwest of Velletri and about 30 kilometres (19 mi) southeast of Rome.
Pavona is a hamlet in Lazio, central Italy. It is a frazione of the comune (municipality) of Albano Laziale. However, its traditional territory is also included in those of Castel Gandolfo and Rome.

Rocca di Papa is a small town and comune in the Metropolitan City of Rome, Lazio, Italy. It is one of the Castelli Romani about 25 kilometres (16 mi) southeast of Rome on the Alban Hills. It is close to the other communes of Velletri, Rocca Priora, Monte Compatri, Grottaferrata, Albano and Marino. It is the center of the Regional Park known as the "Parco Regionale dei Castelli Romani".

Rocca Priora is a small town and comune in the Metropolitan City of Rome, Lazio, Italy. It is one of the Castelli Romani on the Alban Hills about 25 kilometres (16 mi) southeast of Rome, situated in the Regional Park known as the "Parco Regionale dei Castelli Romani".
Velletri is an Italian comune in the Metropolitan City of Rome, approximately 40km to the south-east of the city centre, located in the Alban Hills, in the region of Lazio, central Italy. Neighbouring communes are Rocca di Papa, Lariano, Cisterna di Latina, Artena, Aprilia, Nemi, Genzano di Roma, and Lanuvio. Its motto is: Est mihi libertas papalis et imperialis.

Vermicino is a village and civil parish (frazione) of the Italian municipality of Frascati, in the Province of Rome, Lazio. In Italian language its name means "little worm", in an unused form.