Korsholm Castle was a medieval castle in Vaasa. It was probably built in the 1370s and the oldest record dates back to 1384 (the testament of Bo Jonsson Grip, where the castle was called as Krytzeborg). The castle was originally built to a small island and it was surrounded by a moat and two walls. The castle itself was probably built of wood.
In the Middle Ages Korsholm was a property of several nobles. The most famous of them was Sten Sture the Older. In 1748 the new governor house was built to the site and all medieval structures were demolished. The next house was built in 1851 but it was destroyed by the great fire of Vaasa in 1852. Today a low mound is all that remains of the castle. There is also a monument dedicated to the castle.References:
The Château Comtal (Count’s Castle) is a medieval castle within the Cité of Carcassonne, the largest city in Europe with its city walls still intact. The Château Comtal has a strong claim to be called a 'Cathar Castle'. When the Catholic Crusader army arrived in 1209 they first attacked Raymond-Roger Trencavel's castrum at Bèziers and then moved on to his main stronghold at Carcassonne.
The castle with rectangular shape is separated from the city by a deep ditch and defended by two barbicans. There are six towers curtain walls.
The castle was restored in 1853 by the architect Eugène Viollet-le-Duc. It was added to the UNESCO list of World Heritage Sites in 1997.