The Vigna Cassia catacombs located next to thel Parco Archeologico Neapolis, owe their name to the family that owned the vineyard (at the time of discovery), which was located above the catacombs themselves.
They were found in 1852 during excavations by the Commission of Antiquities and Fine Arts, which at the discovery of steps carved into the rock that led to about 15 meters below street level, decided to deepen the research. After the excavations they discovered that the steps continued to a depth of 25 metres and that they led to the beginning of a series of tunnels.
The Catacombs of Vigna Cassia are considered the largest in Sicily, the beginning of their construction dates back to the third century AD, were active from the second half of the fourth century AD and presented themselves as a real cemetery consisting of a ipogeo of communities, but also five private hypogeums (intended for individual burials).
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.