Denmark's Frederik X becomes king after Queen Margrethe abdicates

What to know about the abdication of Denmark's Queen Margrethe II

King Frederik and Queen Mary of Denmark Make First Appearance as Monarch

PHOTOS: Denmark's Queen Margrethe Signs Abdication, Makes Son King

King Frederik X takes throne of Denmark after abdication of his mother, Queen Margrethe II

Denmark's King Frederik X takes the throne as his mother Queen Margrethe II steps down after 52 years

Frederik X proclaimed King of Denmark after Queen Margrethe abdicates

Frederik X is proclaimed the new king of Denmark after his mother Queen Margrethe II abdicates - AZERTAC

Denmark crowns new King as nation's longest-running monarch abdicates

Denmark Queen Margrethe II announces surprise abdication. Who will succeed her?