The former King of Greece, Constantine, has reportedly been rushed to hospital due to a heart condition.
He felt sick and had intense pain before fainting while he was on holiday with his family in Porto Cheli in the Peloponnese area of mainland Greece, according to the newspaper Espresso.
Constantine, 72, has been taken to the Bioclinic Athens, where his family remain at his bedside. Doctors at the hospital have held an emergency meeting to be fully informed of his condition and medical history.
In May 2009, Constantine underwent a double surgery in London to unblock an artery and replace one of his heart valves.
Constantine was King of Greece from 1964 until the abolition of the Greek monarchy in 1973.
He and his wife, Queen Anne Marie of Denmark were exiled from Greece when their country became a republic via a constitutional referendum in 1973.
He has no objections to Greece being a republic. “If the Greek people decide that they want a republic, they are entitled to have that and should be left in peace to enjoy it,” he told Time magazine.
He has five children with Anne Marie, including Prince Philippos who would have been his heir if the monarchy of Greece had continued.
He is close friends with his second cousin Prince Charles and spent lots of time with him when he lived in London. He attended his godson Prince William’s wedding to Kate Middleton and is a regular at social royal functions.