The Catacomb of Priscilla on the Via Salaria was used for Christian burials from the late 2nd century through the 4th century. This catacomb, according to tradition, is named after the wife of the Consul Manius Acilius Glabrio; he is said to have become a Christian and was killed on the orders of Domitian. Some of the walls and ceilings display fine decorations illustrating Biblical scenes.
The modern entrance to the catacomb is on the Via Salaria through the cloister of the monastery of the Benedictines of Priscilla. The Catacombs of Priscilla are divided into three principal areas: an arenarium, a cryptoportico from a large Roman villa, and the underground burial area of the ancient Roman family, the Acilius Glabrio.
The wall paintings in this catacomb include images of saints and early Christian symbols, such as the painting reproduced in Giovanni Gaetano Bottari's folio of 1754, where the Good Shepherd is depicted as feeding the lambs, with a crowing cock on His right and left hand.
Particularly notable is the 'Greek Chapel' (Capella Greca), a square chamber with an arch which contains 3rd century frescoes generally interpreted to be Old and New Testament scenes, including the Fractio Panis.
The Priscilla catacombs may contain the oldest known Marian paintings, from the early third century. Mary is shown with Jesus on her lap, and the catacombs may have a depiction of the Annunciation, though the latter has been disputed.
On account of the fact that seven early popes and many martyrs were buried in the cemetery, it was known as the 'Queen of the Catacombs' in antiquity. Two popes were buried in the Catacomb of Priscilla: Pope Marcellinus (296 - 304) and Pope Marcellus I (308 - 309).
Alleged relics of Popes Sylvester I, Stephen I, and Dionysius were exhumed and enshrined beneath the high altar of San Martino ai Monti, in the Esquiline area of Rome. Pope Sylvester I was likely originally buried in San Martino ai Monti, although some sources say his remains were transferred there. An unidentified papal sarcophagus discovered during the demolition of Old Saint Peter's Basilica was attributed to Sylvester I and moved to Nonantola Abbey, near the altar that contains the remains of Pope Adrian III. Other sources describe a combination of Sylvester I and Vigilius in an altar in St. Peter's.
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.