Grumentum was an ancient Roman city in the centre of Lucania, in what is now the comune of Grumento Nova. The first Lucanian settlements in the area date from the 6th century BC. The site was founded by the Romans in the 3rd century BC during the Samnite Wars as a fortified vanguard. In 215 BC the Carthaginian general Hanno was defeated under its walls at the Battle of Grumentum, but in 207 BC Hannibal made it his headquarters.
In the Social War it was a strong fortress, and seems to have been held by both sides at different times but was sacked by Italic tribes. It became a colony, perhaps in the time of Sulla, at the latest under Augustus, and became important.
St. Laverius was martyred here in 312 AD. In 370 AD Grumentum became a bishopric but soon afterwards it began to be abandoned. Due to the Saracen inroads (9th-10th centuries), in 954 a new town (Saponara or Saponaria, the modern Grumento Nova) was founded.
Its ruins include those of a large amphitheatre (1st century BC), the only one in Lucania. There are also remains of a theatre. Inscriptions record the repair of its town walls and the construction of thermae (of which remains were found) in 57–51 BC, the construction in 43 BC, of a portico, remains of which may be seen along an ancient road, at right angles to the main road, which traversed Grumentum from south to north. A domus with 4th century mosaics is also present, as well as two small temples of imperial times. Outside the walls monumental tombs, a Palaeo-Christian basilica and an aqueduct have been found.
The aqueduct had its source about 5 km further south and entered the town on the southern side of the plateau. It was transported on arches and emptied into a Castellum Aquae of which some ruins remain.
Many of the finds can be seen in the Archaeological Museum of Grumento Nova.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.