Denmark’s Queen Margrethe II gave up the throne on Sunday to her son Frederik after a 52-year reign. The 83-year-old signed her abdication declaration at a meeting with the government in Copenhagen on Sunday, as television footage from Christiansborg Palace, the seat of the Danish parliament, showed. The former crown prince then symbolically took his mother’s place at the table. “God bless the king,” said Margrethe as she left the hall, then drove back to Amalienborg Palace, the official residence of the Danish royal family. The royal accession is now formally complete and the former crown pri…