Agrigento (Girgenti in Sicilian) is a dense town on the southern coast of Sicily, Italy, and capital of the province of Agrigento. The little city is renowned as the site of the ancient Greek city of Akragras (a.k.a. Acragas in Greek, Agrigentum in Latin, and Kerkent in Arabic), one of the leading cities of Magna Graecia, that is, during the Golden age of Ancient Greece.

Ancient Akragas covers a huge area— much of which is still unexcavated today— but is exemplified by the famous Valle dei Templi ("Valley of the Temples", a misnomer, as it is a ridge, rather than a valley). This comprises a large sacred area on the south side of the ancient city where seven monumental Greek temples in the Doric style were constructed during the 6th and 5th centuries BCE. Now excavated and partially restored, they constitute some of the largest and best preserved ancient Greek buildings outside of Greece itself. They are listed as a World Heritage Site.
The best preserved of the temples are two very similar buildings traditionally attributed to the goddesses Juno Lacinia and Concordia (though archaeologists believe this attribution to be incorrect). The latter temple is remarkably intact, due to its having been converted into a Christian church in 597 CE. Both were constructed to a peripteral hexastyle design. The area around the "Temple of Concordia" was later re-used by early Christians as a catacomb, with tombs hewn out of the rocky cliffs and outcrops.
Temple of the Dioscuri.The other temples are much more fragmentary, having been toppled by earthquakes long ago and quarried for their stones. The largest by far is the Temple of Olympian Zeus, built to commemorate the Battle of Himera in 480 BCE: it is believed to have been the largest Doric temple ever built. Although it was apparently used, it appears never to have been completed; construction was abandoned after the Cathaginian invasion of 406 BCE. The remains of the temple were extensively quarried in the eighteenth century to build the jetties of Porto Empedocle. Temples dedicated to Hephaestus, Heracles and Asclepius were also constructed in the sacred area, which includes a sanctuary of Demeter and Persephone (formerly known as the Temple of Castor and Pollux); the marks of the fires set by the Carthaginians in 406 BCE can still be seen on the sanctuary's stones.
Many other Hellenistic and Roman sites can be found in and around the town. These include a pre-Hellenic cave sanctuary near a Temple of Demeter, over which the Church of San Biagio was built. A late Hellenistic funerary monument erroneously labelled the "Tomb of Theron" is situated just outside the sacred area, and a first century CE heroon (heroic shrine) adjoins the thirteenth-century Church of San Nicola a short distance to the north. A sizeable area of the Greco-Roman city has also been excavated, and several classical necropolises and quarries are still extant.
Much of present-day Agrigento is modern but it still retains a number of medieval and Baroque buildings. These include the fourteenth century cathedral and the thirteenth century Church of Santa Maria dei Greci ("Our Lady of the Greeks"), again standing on the site of an ancient Greek temple (hence the name). The town also has a notable archaeological museum displaying finds from the ancient city.