Santa Bibiana is a small Baroque style church. The church façade was designed and built by Gian Lorenzo Bernini, who also produced a sculpture of the saint holding the palm leaf of martyrs.
According to an ancient, not documented tradition, the church was built in 363 by Roman matron Olimpina on the house where, during the supposed persecution of emperor Julian (361-363), Bibiana, her mother Dafrosa and her sister Demetria would have suffered martyrdom.
On the other hand, according to the Liber Pontificalis the church was erected in 467 under the pontificate of Pope Simplicius. Pope Leo II (682-683) moved there the relics of Martyrs Simplicius, Faustina and Viatrix from the Generosa Catacombs. The same Pope built in the surroundings (iuxta Sanctam Vivianam) a church consecrated to Saint Paul, no longer extant. The church was restored by Pope Honorius III in 1224.
The present facade was designed and built by then 26-year-old Gian Lorenzo Bernini in 1624-1626, as commissioned by Pope Urban VIII. The columns lining the nave are from the original 5th-century church.
The bodies of St Bibiana (Viviana or Vibiana), her mother Dafrosa and her sister Demetria were discovered inside a 3rd-century sarcophagus, and now rest inside an alabaster urn under the major altar. The column just inside the church is said to be the one Bibiana was strapped to.
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.