blogging.cristian.ispir

4oct/094

Amphitheatre discovered in excavation of Portus, ancient port of Rome

ScienceDaily (Oct. 1, 2009) — University of Southampton archaeologists leading a major excavation of Portus, the ancient port of Rome, have uncovered the remains of an amphitheatre-shaped-building, solving a mystery which has puzzled experts for over 140 years.

THE PORTUS PROJECT

The excavation team, working in collaboration with the British School at Rome, is conducting the first ever large-scale dig at Portus on the banks of a hexagonal shaped man-made lake which formed the 2nd century harbour, near the Italian capital.

"When the site was visited by archaeologist Rodolfo Lanciani in the 1860s he marked on his plans the remains of a theatre, but subsequently no trace of the building could be found," says Portus Project Director and leading expert in Roman Archaeology at the University of Southampton, Professor Simon Keay.

"Our team has rediscovered this 'theatre' and proved it was in fact a building more akin to an amphitheatre. Lanciani had only found half of the structure, leading him to misinterpret its shape and function."

Funded by the Arts and Humanities Research Council, experts from Southampton have been working with colleagues from the BSR, The Italian Archaeological Superintendency for Ostia and the University of Cambridge, to carry out extensive excavation at Portus. They have uncovered a large Roman warehouse, the 'amphitheatre' and what the team have identified as an Imperial palace. This is likely to have played host to renowned emperors such as Hadrian.

Portus was Rome's gateway to the Mediterranean for most of the Imperial period and played a key role in funnelling food, slaves, wild animals, marble and all manner of luxury goods from across the Mediterranean and beyond to the citizens of Rome. It was vital to the survival of the Empire and the only real 'transport hub' serving the city.

"The 'amphitheatre' we have discovered was similar in ground area to the Pantheon in Rome, but it is unclear exactly what it was used for," continues Professor Keay.

"Gladiatorial combat may have taken place there - wild beast baiting, the staging of mock sea battles, or it may have been a form of Roman 'folly', shaped like an amphitheatre, but used as a monumental garden. It is unusual to find this type of building so close to a harbour."

Having solved one riddle, archaeologists have now uncovered another; the white marble head of a statue unearthed at the site of once-luxurious rooms close to the 'amphitheatre'. It is thought the head dates back to the 2nd or early 3rd century, however it is less clear who it depicts.

"The elderly bearded male wearing a flat skull-cap could suggest it is Ulysses, however it is equally possible it is a representation of one of the Greek sailors who accompanied him on his travels. For the moment his identity remains a mystery," concludes Professor Keay.

Part of the 'Portus Project' involves the work of the University of Southampton's Archaeological Computing Research Group. They are producing computer generated images which bring the port to life and provide archaeologists with a valuable 'tool' with which to explore the site. The University of Southampton and the BSR are jointly using ground-penetrating radar and other techniques to map buried buildings and other structures. The Portus Project has also been undertaking a geophysical survey of the Isola Sacra, an island to the south of Portus, and has found a major new canal and traces of Rome's marble yards.

Research has been underway at Portus for several years and Professor Keay hopes to continue working there. "This is one of the most important archaeological sites in the world," he says.

"Certainly it should be rated alongside such wonders as Stonehenge and Angkor Wat in Cambodia. So much of this Imperial port has been preserved and there is much more to learn about its role in supplying Rome and in the broader economic development of the Roman Mediterranean."

29sept/090

Le site archéologique de Pompéi et Google Maps

J'ai un peu bricolé avec l'excellent Google Maps, le marteau :) et le livret de documents et de cartes sur le site de Pompéi de Mme Becker-Piriou. J'ai mis tout ensemble, j'ai rajouté un peu de temps et en voilà le résultat.

J'espère que la carte ci-dessous vous aidera à mieux saisir "l'espace" de la cité en identifiant rapidement (pour les prochains cours, en tout cas) les divers secteurs de la ville mis au jour par les archéologues du XIXe et XXe siècles.
Cliquer ici pour voir les détails de la carte (insulae, viae, etc)

Afficher Pompéi dans une carte plus grande

4août/090

Venice « Ancestor » City Mapped for First Time

July 30, 2009

The outline of an ancient Roman city buried beneath cropland near Venice, Italy, has been mapped in detail for the first time with the aid of aerial photography, a new study says. (See the Altinum map and aerial pictures.)

5juin/090

Fire And Water Reveal New Archaeological Dating Method

ScienceDaily (May 25, 2009) — Scientists at The University of Manchester have developed a new way of dating archaeological objects – using fire and water to unlock their 'internal clocks'.

The simple method promises to be as significant a technique for dating ceramic materials as radiocarbon dating has become for organic materials such as bone or wood.

A team from The University of Manchester and The University of Edinburgh has discovered a new technique which they call 'rehydroxylation dating' that can be used on fired clay ceramics like bricks, tile and pottery.

Working with The Museum of London, the team has been able to date brick samples from Roman, medieval and modern periods with remarkable accuracy.

They have established that their technique can be used to determine the age of objects up to 2,000 years old – but believe it has the potential to be used to date objects around 10,000 years old.

The method relies on the fact that fired clay ceramic material will start to chemically react with atmospheric moisture as soon as it is removed from the kiln after firing. This continues over its lifetime causing it to increase in weight – the older the material, the greater the weight gain.

In 2003 the Manchester and Edinburgh team discovered a new law that precisely defines how the rate of reaction between ceramic and water varies over time.

The application of this law underpins the new dating method because the amount of water that is chemically combined with a ceramic provides an 'internal clock' that can be accessed to determine its age.

The technique involves measuring the mass of a sample of ceramic and then heating it to around 500 degrees Celsius in a furnace, which removes the water.

The sample is then monitored in a super-accurate measuring device known as a microbalance, to determine the precise rate at which the ceramic will combine with water over time.

Using the time law, it is possible to extrapolate the information collected to calculate the time it will take to regain the mass lost on heating – revealing the sample's age.

Lead author Dr Moira Wilson, Senior Lecturer in the School of Mechanical, Aerospace and Civil Engineering (MACE), said: "These findings come after many years of hard work. We are extremely excited by the potential of this new technique, which could become an established way of determining the age of ceramic artefacts of archaeological interest.

"The method could also be turned on its head and used to establish the mean temperature of a material over its lifetime, if a precise date of firing were known. This could potentially be useful in climate change studies.

"As well as the new dating method, there are also more wide-ranging applications of the work, such as the detection of forged ceramic."

The three-year £100,000 project was funded by the Leverhulme Trust, with the microbalance - which measures mass to 1/10th of a millionth of a gram – funded by a £66,000 grant from the Engineering and Physical Science Research Council (EPSRC).

Researchers are now planning to look at whether the new dating technique can be applied to earthenware, bone china and porcelain.

The full research team comprised Dr Moira Wilson, Dr Margaret Carter, Prof William Hoff, Ceren Ince, Shaun Savage and Bernard McKay from The University of Manchester, Professor Chris Hall from the School of Engineering and Centre for Materials Science and Engineering at The University of Edinburgh and Ian Betts from The Museum of London.

The Canterbury Archaeological Trust provided additional samples and information for the study while Ibstock Brick Ltd provided kiln-fresh bricks.