In the prehistoric age on the hill of San Giusto there was a castelliere (fortified borough), which in the Roman age became an important urban centre. The fortress, built by the Venetians in the Middle Ages, was pulled down in the 14th century by will of the Patriarch of Aquileia and, in 1470 only, it was rebuilt by Friedrich II of Habsburg; the square tower and the two-storey building, which today houses the Castle Museum, date back to this period.
Under the rule of the Republic of Venice, which at the beginning of the 16th century had re-established its rule over Trieste, the castle's defences were strengthened and, under the Austrian rule again, the works continued until the building, in 1630, of the large ramparts and of the linking walls.
The fortified complex can be accessed from a ramp ending in a wooden drawbridge, over a not very wide moat; after crossing the cross-vaulted hall, you will reach the Piazzale delle Milizie (Square of the Troops), where stairs and allures lead to the ramparts.Since 1930 the castle has been a property of the Municipality, which has equipped it for tourist purposes and uses it for cultural events, shows and temporary exhibitions.
Since 2001 the Lalio rampart of the Castle of San Giusto has been housing the new Lapidario Tergestino, which preserves all the Roman stone finds that were previously displayed in the Orto Lapidario garden.
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.