In 582, Bishop Gallomagne brought to Troyes the relics of Nizier, primate of Lyon, who died in 573 and was highly venerated in the region. He moved relics to the church of Saint-Maur, built in the late 5th century and renamed Saint-Nizier.
The current church dates from the 16th century, with its square tower completed around 1619. One of the bells seen at the top of the tower is the only vestige of the Porte Saint Jacques (now rue Kléber), one of the city's oldest fortified gates, destroyed in 1832.
The remarkable glazed tile roof evokes the Burgundian style.Inside, the church's Gothic aisles are of an impressive size and clarity. The stained glass windows, an exceptional collection by the Trojan School, illustrate subjects from the Old and New Testaments, as well as Trojan history and legends. Several anonymous sculptures date from the early Renaissance.
Nearby, you'll find a number of restored 16th-century half-timbered houses, including the Maison du Dauphin, one of the oldest in Troyes.
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.