Église Saint-Vincent-de-Paul was built on a demolished convent and chapel of Reformed Augustinians, which explains why it is commonly known as 'Les Réformés' despite being a Roman Catholic church. The church building itself was designed by the architect François Reybaud and the abbey Joseph-Guillaume Pougnet, and built from 1855 to 1886. It is neogothic, with ogival curbs in the ceiling. The two arrows are 70 metre high.
The bronze gates were designed by Caras-Latour, the high altar was designed by Jules Cantini (1826-1916), and the stained windows were designed by Édouard Didron (1836-1902). Additionally, sculptor Louis Botinelly (1883-1962) designed the statues of Joan of Arc and of Jesus. As for the organ pipes, they were made by Joseph Merklin (1819–1905).
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.