Ostia Antica Lazio
Ostia Antica, Rome (Lazio) 2000 – 2005
November – December 2001,
February – March 2005
Ostia Antica is located in the Comune di Roma, 25km west of Rome. A major port town in antiquity, Ostia now lies 3km from the west coast of the Italian peninsula due to the deposition of sediment from the River Tiber.
Resistivity and gradiometry geophysical surveys were conducted at Ostia over the course of three seasons.
In April 2000, a small geophysical survey was undertaken by the British School at Rome, on behalf of Dr. Janet Delaine of the University of Reading, behind the Insula of the Paintings at Ostia Antica. The aims and objectives of the survey were to test the application of resistivity as a means of locating sub-surface remains associated with the Insula as well as structures uncovered in an excavation outside the House of Jove and Ganymede. The survey was carried out with a Geoscan RM15 resistance meter in 2 areas of the site.
The results successful located the line of a Roman drain and revealed a previously unknown series of rooms and corridors in both survey areas.
In November and December 2001, a geophysical survey was undertaken by Southampton University and The British School at Rome, on behalf of the Deutsches Archäologisches Institut and The American Academy at Rome. The survey was initiated with the aim of locating and mapping sub-surface archaeological features in the vicinity of the excavated city; to identify the areas as yet unexcavated and shed new light on the plan and different phases of the ancient settlement. The survey was undertaken with a Geoscan Research FM36 Fluxgate Gradiometer over 11 areas on the site.
The survey located a series of structures north of the excavated city which would have followed the former course of the river Tiber during the Roman period. These formed a continuation of warehouses and insula blocks found in previous excavations. A strong linear feature which cuts along the discovered structures in this area has been interpreted as the line of a road along the river’s edge.
The results of the survey in the western area of the port suggested a continuation of the excavated structures sited along the course of the river. Many of the structures in this complex comprised horrea running in two lines from the river to the road, and mark the southern boundary of the port. The survey also located two new insula blocks and a portico in the vicinity of the theatre where previous reconstructions had envisaged only open space.
The 2001 season also identified the continued line of the defensive wall encompassing the south and west of the city with turrets being identified along the wall. Outside this wall, the presence of tabernae and a series of structures on the line of the roads leading out of the city were visible in the south east, while to the south west villa constructions with associated structures were found.
Multiplexed resistivity survey under way in the garden of the Case degli Affreschi
In February and March 2005, magnetometry, resistivity and multiplexed-resistivity surveys were conducted by the University of Southampton and The British School at Rome on behalf of the Soprintenza Archeologia di Ostia.
The aim of this survey was to advance understanding of the 2nd century AD development of apartments in the south-west quadrant of the town, and to map the earlier Julian buildings buried beneath the garden areas of the Hadrianic era city. Other surveys were also carried out close to the present course of the River Tiber to investigate the existence of buried structures and the extent of a mosaic in the palestra of the Baths of the Forum.
The results in the Hadrianic gardens revealed colonnades associated with the garden plan of the 2nd century structures while features on a different alignment to the apartment blocks hinted at the existence of earlier building phases probably dating to the Julio-Claudian plan of the town.
The resistivity results from the area of the palestra close to the Baths of the Forum indicated the extensive remains of the mosaic that would have originally covered the entire area. The magnetometer survey conducted over the same area showed the appearance of earlier building structures that occupied the space later used for the palestra.