Basilica of St. Donatian and St. Rogatian is a Roman Catholic minor basilica in Nantes. The church building stands on the site of an ancient Gallo-Roman villa. Excavations in 1873 brought to light an ancient pagan cemetery, a pit in the center of the apse containing 27 nails assigned to the coffins of the two martyrs and reveal that four church buildings were successively below the basilica.
The promulgation of the Edict of Constantine, nine years after the death of the martyrs, sees developing a cult around the bodies of two brothers as martyrs, first dislocated on the rack, whipped and driven out of the city not far from the current basilica where an executioner speared them in the throat and then beheaded them. According to tradition, their bodies are placed, 21 years after their death, in a gray marble sarcophagus, measuring 2.25 meters long and 75 centimeters wide. The relics then attract pilgrims. The first church was built in the tradition of family ownership of Nantes saints to 490.
The Norman invasions destroyed the first building, but once peace returned, a new church building was built around the year 980. However, according Dubuisson-Aubenay, the primitive sanctuary remnants still exist in the 17th century, including an ancient apse.
16 March 1739, the foundation stone of the reconstruction is by Jean-Marie de Trevelec, adviser to the Parliament of Brittany and his wife Françoise Charrette.
Transformed into a hospital during the French Revolution, it was sold in 1796. Once the church returned to use for worship in 1802, the missing parts were reconstructed from 1804, giving birth to a larger church of cruciform shape, consecrated by Bishop Duvoisin 28 March 1806.
The current building dates from the 19th century. It is dedicated to St. Donatian and St. Rogatian. It was elevated to the rank of minor basilica on 14 March 1889.
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.