Basilica of Maxentius

Remains of the Basilica of Maxentius and Constantine in Rome. The building's northern aisle is all that remains.

The Basilica of Maxentius and Constantine (sometimes known as the Basilica Nova 'new basilica' or Basilica Maxentius) was the largest building in the Roman Forum.

History

Construction began on the northern side of the forum under the emperor Maxentius in 308, and was completed in 312 by Constantine I after his defeat of Maxentius at the Battle of the Milvian Bridge.

The building consisted of a central nave covered by three groin vaults suspended 39 meters above the floor on four large piers, ending in an apse at the western end containing a colossal statue of Constantine (remnants of which are now in a courtyard of the Palazzo dei Conservatori of the Musei Capitolini). The lateral forces of the groin vaults were held by flanking aisles measuring 23 by 17 metres (75 x 56 feet). The aisles were spanned by three semi-circular cross vaults perpendicular to the nave, and narrow arcades ran parallel to the nave beneath the cross-vaults. The nave itself measured 25 metres by 80 metres (83 x 265 feet) creating a 4000 square meter floor. Like the great imperial baths, the basilica made use of vast interior space with its emotional effect.

Reconstruction of the plan.

Running the length of the eastern face of the building was a projecting arcade of archs. On the south face was a projecting (prostyle) porch with four columns (tetrastyle).

All that remains of the bascilica is the north aisle with its three concrete cross vaults.The ceilings of the the cross vaults show advanced weight-saving structural skill with octagonal ceiling coffers.

In modern usage, a basilica has come to be defined as a place of worship; during ancient Rome, it was a combination of a court-house, council chamber and meeting hall. There were, however, numerous statues of the gods displayed in niches set into the walls. The wrestling events were held here during the 1960 Summer Olympic Games.

On the outside wall of the basilica, facing onto the via dei Fori Imperiali, are contemporary maps showing the various stages of the rise of the Roman Empire.

Detail of the coffered vaults of concrete

Engineering

The Basilica Maxentius is a marvel of Roman engineering work. At the time when it was built it was the largest structure to be built and thus is a unique structure taking both aspects from Roman baths as well as typical Roman basilicas. At the time it used the most advanced engineering techniques which we known, including innovations taken from the Markets of Trajan and the Baths of Diocletian.

Similar to many basilicas at the time such as the Basilica Ulpia, the Basilica Maxentius featured a huge open space in the central nave, but unlike other basilicas instead of having columns support the ceiling the entire building was built using arches, a much more common appearance in Roman baths than basilicas. Another difference from traditional basilicas is the roof of the structure. While traditional basilicas were built with a flat roof, the Basilica Maxentius was built with a folded roof, decreasing the overall weight of the structure and decreasing the horizontal