Consecrated in the 11th century, the San Giovanni del Toro church was restored in 1715 after damage caused by an earthquake, and it was restored again in the 1990s. The church is named for John the Apostle and for 'Il Toro', the former name of the old aristocratic quarter in which it was built. It is especially noted for its pulpit, dating from around the 13th century.
The pulpit is notable for its mosaics, the decorative patterns of which inspired the interlocking patterns used by M.C. Escher, who spent time in Ravello in the 1920s and studied the church and the pulpit; Ravello was one of his favorite places. One mosaic is of Jonahe merging from the whale. An eagle supports the reading desk, and it holds a book opened to the first sentence of the Gospel of John. The 'beautiful' pulpit, which dates from the time of Roger I of Sicily, also contains Oriental pottery and Arabic script, and the steps up to it contain well-preserved frescoes with scenes from the life of Christ. There is a side chapel with a stucco figure of Saint Catherine and her wheel.
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.