Piazza della Loggia is fine example of Renaissance piazza. The construction of eponymous Palazzo della Loggia (current Town Hall) began in 1492 under the direction of Filippo de' Grassi and completed only in the 16th century by Sansovino and Palladio. Vanvitelli designed the upper room of the palace (1769).
On the south side of the square are two 15th–16th century Monti di Pietà (Christian lending houses). Their façades are embedded with ancient Roman tombstones, one of oldest antique lapidary displays in Italy. At the centre of the east side of the square stands a tower with a large astronomical clock (mid-16th-century) on top of which there are two copper anthropomorphic automata which strike the hours on a bell. On May 28, 1974, the square was targeted by the terrorist bombing.
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.