Scylletium was situated on the east coast of Calabria (ancient Bruttium), According to a tradition generally received in ancient times, Scylletium was founded by an Athenian colony, a part of the followers who had accompanied Menestheus to the Trojan War. But no historical value can be attached to such statements, and there is no trace in historical times of Scylletium having been a Greek colony, still less an Athenian one. It appears, indeed, during the historical period of the Greek colonies to have been a place of inferior consideration, and a mere dependency of Crotona, to which city it continued subject until it was wrested from its power by the elder Dionysius, who assigned it with its territory to the Loerians. It is evident that it was still a small and unimportant place at the time of the Second Punic War, as no mention is found of its name during the operations of Hannibal in Bruttium, though he appears to have for some time had his headquarters in its immediate neighborhood, and the place called Castra Hannibalis must have been very near to Scylletium.
In 124 BC the Romans, at the instigation of C. Gracchus, sent a colony to Scylletium, which appears to have assumed the name of Minervium or Colonia Minervia. The name is written by Velleius Scolatium; and the form Scolacium is found also in an inscription of the reign of Antoninus Pius, from which it appears that the place must have received a fresh colony under Nerva. Scylletium appears to have become a considerable town after it received the Roman colony, and continued such throughout the Roman Empire. Towards the close of this period it was distinguished as the birthplace of the Roman statesman Cassiodorus, founder of the Vivarium, a monastery dedicated to the coexistence of coenobitic monks and hermits, who has left us a detailed but rhetorical description of the beauty of its situation, and fertility of its territory. Cassiodorus' writings also make mention of production of highly priced terra cotta.
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.