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Ostia Antica was the harbour of ancient Rome and perhaps its first colonia.

Contents 1 History 1.1 Origins 1.2 Rise 1.3 Sacking by pirates 1.4 Height 1.5 Late-Roman and sub-Roman 1.6 Sacking and excavation 1.7 Modern site 2 Photos 3 Notes 4 References 5 External links

Located at the mouth of the River Tiber, Ostia was said to have been founded by Ancus Marcius, the fourth king of Rome, in the 7th century BC. A later inscription refers to the event [Anco Marcio regi quarto a Romulo qui ab urbe condita primum coloniam --- deduxit (Ancus Marcius, the fourth of the kings from Romulus after the founding of the city [Rome] founded this first colony.]. However the most ancient archaeological remains so far discovered are no older than the 4th century BC. The most ancient buildings currently visible are from the 3rd century BC, notably the Castrum (military camp) and of a slightly later date are, the Capitolium (temple of Jupiter, Juno and Minerva). The opus quadratum, the walls of the original castrum at Ostia provide important evidence for the building techniques that were employed in Roman urbanisation during the period of the Middle Republic.

Although Ostia was probably founded for the sole purpose of military defense — since hostile armies could eventually reach Rome by water through the mouth of the Tiber River — in time the port became a very important commercial harbor. Ostia is a large town, about three times larger than Pompeii.

Many of the goods that Rome received from its colonies and provinces passed through Ostia, including the essential grain supply to the city of Rome. In this role, Ostia soon replaced Pozzuoli, known to the ancient Romans as Puteoli, a port near Naples. In 87 BC, the town was razed by Gaius Marius.

In 68 BC, the town was again sacked, this time by pirates.^[1] During the sacking, the port was set on fire, the consular war fleet was destroyed, and two prominent senators were kidnapped. This attack caused such panic in Rome, that Pompey Magnus arranged for the tribune Aulus Gabinius to rise in the Roman Forum and propose a law, the Lex Gabinia, to allow Pompey to raise an Army and destroy the pirates. Within a year, the pirates had been defeated.

The town was then re-built, and provided with protective walls by the statesman and orator Marcus Tullius Cicero.

The town was further developed during the 1st century AD under the influence of Tiberius, who ordered the building of the town's first Forum. The town was also soon enriched by the construction of a new harbor on the northern mouths of the Tiber (which reaches the sea with a larger mouth in Ostia, Fiumara Grande, and a narrower one near to the current Fiumicino International Airport). The new harbor, not surprisingly called Portus, from the Latin for "harbor," was excavated from the ground at the orders of the emperor Claudius. This harbour became silted up and needed to be supplemented later by a harbor built by Trajan finished in the year AD 113; it has a hexagonal form, in order to reduce the erosive forces of the waves. This took business away from Ostia itself (further down river) and began its commercial decline.

Ostia itself was provided with all the services a town of the time could require; in particular, a famous lighthouse. Ostia contained the earliest post-diaspora house-synagogue yet identified, an insula refitted as a synagogue in the late second century; it created a stir when it was unearthed in 1960-61.^[2] By 1954 eighteen mithraea had also been discovered: Mithras had his largest following among the working population that were the majority of this port town. Archaeologists also discovered the public latrinas, organized for collective use as a series of seats that allow us to imagine today that the function was also a social moment. In addition, Ostia had a large theatre, many public baths, numerous taverns and inns, and a firefighting service.

Trajan too, required a widening of the naval areas, and ordered the building of another harbor, again pointing towards the north. It must be remembered that at a relatively short distance, there was also the harbor of Civitavecchia (Centum Cellae), and Rome was starting to have a significant number of harbours, the most important remained Portus.

Ostia grew to 50,000 inhabitants in the 2nd century, reaching a peak of some 75,000 inhabitants in the 2nd and 3rd century AD. Ostia became an episcopal see as early as the 3rd century AD, the cathedral (titulus) of Santa Aurea being located on the burial site of St. Monica (mother of Augustine - she died in an inn in the town). In time, naval activities became focussed on Portus instead. A slow decadence began in the late Roman era around the time of Constantine I, with the town ceasing to be an active port and instead becoming a popular country retreat for rich aristocrats from Rome itself (along the lines of Brighton's relationship to London in the 18th century).^{[citation needed]}

The decaying conditions of the city were mentioned by St. Augustine when he passed there in the late 4th century. The poet Rutilius Namatianus also reported the lack of maintenance of the city in 414.

With the end of the Roman Empire, Ostia fell slowly into decay, and was finally abandoned in the 9th century due to the repeated invasions and sackings by Arab pirates, including the Battle of Ostia, a naval battle in 849 between Christian and Saracens; the remaining inhabitants moved to Gregoriopolis.

In the Middle Ages, bricks from buildings in Ostia were used for several other occasions. The Leaning Tower of Pisa was entirely built of material originally belonging to Ostia.^{[citation needed]}

A "local sacking" was carried out by baroque architects, who used the remains as a sort of marble store for the palazzi they were building in Rome. Soon after, foreign explorers came in search of ancient statues and objects. The Papacy started organizing its own investigations with Pope Pius VII; under Mussolini massive excavations were undertaken from 1938 to 1942. The first volume of the official series Scavi di Ostia appeared in 1954; it was devoted to a topography of the town by Italo Gismondi and after a hiatus the research still continues today. Though untouched areas adjacent to the original excavations were left undistrurbed awaiting a more precise dating of Roman pottery types, the "Baths of the Swimmer", named for the mosaic figure in the apodyterium, were meticulously excavated, 1966-70 and 1974-75, in part as a training ground for young archaeologists and in part to establish a laboratory of well-understood finds as a teaching aid. It has been estimated that two thirds of the ancient town have currently been found.

The site is no longer on the coast, due to sediments changing the local topography. It is near to the modern town of Ostia Lido in the Comune of Rome. The ancient site is open to visitors, and is easily reachable by a short rail trip from Rome.

The inscription originally placed on the main gate.	The theatre as seen from the ancient main road.	Inside the theatre.	Mosaic floor in the market.
Mosaique ostia.jpg Mosaic of a dolphin

• Hermansen, Gustav 1982. Ostia: Aspects of Roman City Life (Edmonton: University of Alberta Press)
• Meiggs, R. (1960) 1973. Roman Ostia 2nd ed. (Oxford University Press) The standard overview.
• Packer, James E. 1971 The Insulae of Imperial Ostia" M.Am.Acad. Rome 31
• Pavolini, C. 'Ostia: Guida Archeologica Laterza (Rome:Laterza) (Italian)

• Ancient Ostia Virtual panoramas and photo gallery (English/Italian)
• Ostia — Harbor City of Ancient Rome including an introduction (English)
• Ostia Antica Information, images and events at Ostia Antica (Italian/English)
• Extensive photo gallery of Ostia (English)
• A Visit to Ancient Ostia (English)
• The Roman Theatre at Ostia Antica The Ancient Theatre Archive. Theatre specifications and virtual reality tour of the ancient theatre (English)

Coordinates: 41°45′N, 12°18′E