Nyköping Castle

Nyköping Castle, located in Nyköping, Sweden, dates back to the Birger Jarl era. The castle hosted a tragedy at the grand Christmas banquet of 1317, where King Birger’s brother dukes, Eric and Valdemar, are believed to have perished. The cause of their death remains unclear. Known as the Nyköping Banquet, this horror marked a dark chapter in Nyköping Castle’s long history. The castle underwent construction works by King Charles, who later became Charles IX of Sweden, in the late 16th century, transforming it into a renaissance palace. By the 1760s, some parts of the castle were no longer in use and would eventually be refurbished in the 20th century. Today, Kungstornet (the King's Tower) and Gamla residenset (the Old Residence) house the permanent exhibits of the Sörmlands museum.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons