One of the A Coruña's most interesting monuments, San Anton castle (Castillo de San Antón) in A Coruña was constructed during the 16th and 17th centuries. A fortress built on a small island in the bay to defend the city against attacks coming from the sea, it effectively defended the entrance to the city against the English assault led by Francis Drake in 1589. There are some lovely collections of Celtic jewellery that were found on archaeological digs in Galicia on display inside the castle today.
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.