Bartolo Longo started restoring a The Pontifical Shrine of the Blessed Virgin of the Rosary church in disrepair in October 1873. In 1875, Longo obtained a painting of Our Lady of the Rosary from a convent in Naples and raised funds to restore the image so as to locate it in the church. Miracles began to be reported and pilgrims began flocking in droves to the church. Three hundred people of the area pledged a penny a month for the work. Bartolo Longo was encouraged by Giuseppe Formisano, Bishop of Nola, to begin the construction of a larger church—the cornerstone being laid on the 8 May 1876. The church was consecrated on the 7 May 1891 by Cardinal Raffaele Monaco La Valletta.
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.