Kronobergs Slott is a medieval castle ruin, picturesquely situated on a bankside island in the lake Helgasjön. It is located about 5 kilometres north of the provincial capital Växjö .
The emergence of Kronobergs Slott goes back to the period around 1444 when Bishop Lars Mikaelsson built a fortified residence for the bishops of Växjö. During the Dacke War in 1542/43, Kronobergs Slott was the headquarter of a farmers' army, which was fighting against the troops of the Swedish King Gustav Vasa under the leadership of Nils Dacke, who was honoured as a national hero in Småland.
Over the next 200 years, Kronobergs Slott was frequently the subject of military conflicts, because of its function as a border fortification to the former Danish provinces Skåne and Blekinge. During this time, the fortress was burnt down at least twice by Danish troops and rebuilt a bit bigger each time after the reconquests.
Today's ruins of the rectangular castle with its four round corner towers are the remains of Kronobergs Slott after the last reconstruction in 1616. After the Danish provinces had finally become Swedish in 1658, the fortress lost its strategic value. It was abandoned and ruined at the end of the 17th century, served as a temporary quarry for building houses in Vaxjö. https://www.guidebook-sweden.com/en/guidebook/destination/kronobergs-slottsruin-castle-ruin-vaexjoe