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:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.