Prince Mahidol came back to Thailand and passed away when His Majesty was not yet two years old. After a brief period of primary schooling in Bangkok, His Majesty left with the rest of his family for Switzerland where he continued his secondary education at the Ecole Nouvelle de la Suisse Romande, Chailly sur Lausanne and received the Bachelieres Lettres diploma from the Gymnase Classique Cantonal of Lausanne.