epa10950699 Spain's Crown Princess Leonor at the Royal Palace after the ceremony in which she swore allegiance to the Spanish Constitution at the Spanish Lower House, in Madrid, Spain, 31 October 2023. Princess Leonor swore an oath of loyalty to the Spanish Constitution on her 18th birthday. Upon reaching the age of majority and taking the oath before Parliament, the Princess could exercise the royal function automatically and immediately if her father were to be disqualified under any circumstance.  EPA/DANIEL GONZALEZ / POOL