During the 16th to the 18th century, the keep was used as a prison.

It was used as a prison in the 19th century.

In the 15th century it was used as a prison.

The church was also used as a prison and a town hall.

It was used as a prison from 1833 to the early 20th century.

From then on, the building was used as a prison.

Used from the 18th to the 20th century as a prison.

In 1933 the island started to be used as a political prison.

It was used as a prison between 1303 and 1827.

The island was used as a prison during the 18th-19th century.