Ardea is an ancient town and comune in the province of Rome, 35 km south of Rome and about 4 km from today's Mediterranean coast.
The economy is mostly based on agriculture, although, starting from the 1970s, industry has had an increasingly important role.
Remains of the ancient city include the old defensive agger, dating to the 7th century BC and later (4th century BC) updated to larger walls. Archaeological excavations have brought to light four temples, of unknown dedication. Part of the pavement of a basilica (c. 100 BC) have also been found in the area of the ancient Forum. Other sights include:
Church of Santa Marina, erected in 1191 by Cencio Savelli, the future Pope Honorius II. The interior, on a single nave, was originally entirely frescoed.
Romanesque Church of San Pietro Apostolo (12th century), which was a possession of the monks of San Paolo Fuori le Mura of Rome. It incorporates a former watchtower used to counter Saracen attacks, now turned into a bell tower. It has 15th century frescoes and a 16th century wooden crucifix.
The Giardini della Landriana, designed by Russell Page.
Giacomo Manzù Museum, housing some 400 works of the artist.
Tor San Lorenzo', a tower in the eponymous seaside frazione. It was rebuilt in 1570 after a design by Michelangelo, in the area of a former Palaeo-Christian church devoted to St. Lawrence.