MADRID, SPAIN - JANUARY 26: Queen Sofia during the act of the oath or promise before the Flag at the "El Rey" Barracks of the Royal Guard, on January 26, 2024 in El Pardo (Madrid, Spain).  The oath or promise of the Flag is one of the most solemn acts that exist in any nation. In it, with a kiss on the Flag, an oath or promise of obedience and fidelity in the service to the Fatherland is materialized, even at the cost of one's own life. (Photo By Jose Oliva/Europa Press via Getty Images)
MADRID, SPAIN - JANUARY 26: Queen Sofia during the act of the oath or promise before the Flag at the "El Rey" Barracks of the Royal Guard, on January 26, 2024 in El Pardo (Madrid, Spain).  The oath or promise of the Flag is one of the most solemn acts that exist in any nation. In it, with a kiss on the Flag, an oath or promise of obedience and fidelity in the service to the Fatherland is materialized, even at the cost of one's own life. (Photo By Jose Oliva/Europa Press via Getty Images)
MADRID, SPAIN - JANUARY 26: Queen Sofia during the act of the oath or promise before the Flag at the "El Rey" Barracks of the Royal Guard, on January 26, 2024 in El Pardo (Madrid, Spain).  The oath or promise of the Flag is one of the most solemn acts that exist in any nation. In it, with a kiss on the Flag, an oath or promise of obedience and fidelity in the service to the Fatherland is materialized, even at the cost of one's own life. (Photo By Jose Oliva/Europa Press via Getty Images)
MADRID, SPAIN - JANUARY 26: Queen Sofia during the act of the oath or promise before the Flag at the "El Rey" Barracks of the Royal Guard, on January 26, 2024 in El Pardo (Madrid, Spain).  The oath or promise of the Flag is one of the most solemn acts that exist in any nation. In it, with a kiss on the Flag, an oath or promise of obedience and fidelity in the service to the Fatherland is materialized, even at the cost of one's own life. (Photo By Jose Oliva/Europa Press via Getty Images)
MADRID, SPAIN - JANUARY 26: Queen Sofia during the act of the oath or promise before the Flag at the "El Rey" Barracks of the Royal Guard, on January 26, 2024 in El Pardo (Madrid, Spain).  The oath or promise of the Flag is one of the most solemn acts that exist in any nation. In it, with a kiss on the Flag, an oath or promise of obedience and fidelity in the service to the Fatherland is materialized, even at the cost of one's own life. (Photo By Jose Oliva/Europa Press via Getty Images)