Prince Charles gave a rare update on the condition of his father, Prince Philip, who was released from the hospital after undergoing a heart procedure.

More than 10 days since the 99-year-old royal went home to Windsor Castle, where he has been isolating with Queen Elizabeth, the Prince of Wales said that Philip is doing a lot better. Charles shared his father's condition to Mayor Kostas Bakoyannis of Athens during his visit to Greece for their 200th Independence Day. The queen's son looked very pleased while talking about his father, who was born the prince of Greece and Denmark in 1921.

Philip, however, gave up his title and claim to the throne when he married then-Princess Elizabeth. Charles has always liked coming to Greece because it's half of his roots and the homeland of his grandfather, Prince Andrew of Greece and Denmark.

According to royal commentators Russell Myers and Anne Gripper of Pod Save the Queen, Philip is likely "causing trouble" in Windsor Castle now that he's recovering fast from the surgery. The queen's husband is known for not having a filter when he talks or shares his opinions and would, too often, put his foot in his mouth. They suggested that he might have been making his demands from the royal staff in a manner only he can get away with.

But royal commentator Rebecca English said that Philip likely has round-the-clock medical care at Windsor Castle after his delicate surgery. While he could be watched over by a medical team in the hospital, English said that a patient like Philip might prefer to recover at home, where he will be more comfortable.

Meanwhile, at Greece's Independence Day celebrations, the Prince of Wales hailed the Greeks for their "fortitude" and courage to topple the Ottoman empire in 1821. Charles said in his speech that he's delighted to be back in Greece because it's a very special place for him.

Philip's mother, Princess Alice, was also staying in Athens during the Nazi occupation in the Second World War. She took care of a Jewish family and was hailed as one of the "Righteous Among the Nations" for this act of bravery.

Charles laid a wreath at the Tomb of the Unknown Soldier while the Greek military band played the song "God Save the Queen." According to observers, the Prince of Wales appeared teary-eyed during this special ceremony. To thank and honor the Prince of Wales for his visit, Athens awarded him with the medal of valor.