His godparents were the German Emperor Wilhelm II, King Carol I, Queen Elisabeth and Empress Maria Feodorovna of Russia.

The royal family had to quickly bury him on the grounds of Cotroceni Palace, before they went into retreat to Iași, the old capital of Moldavia, the unoccupied part north-eastern Romania.

His original tombstone read: Here lies the youngest son of King Ferdinand and Queen Marie, born 21 December 1912 and died October 1916, in time of war, while the soldiers of Romania were sacrificing their lives for the centuries’ dream of achieving national unity.

In 1941, Mircea was reburied, at the request of Princess Ileana, from Cotroceni to the little chapel of Bran Castle, close to the burial place of Marie's heart.

[citation needed] In January 2018, it was announced that the remains of King Carol II will be moved to the new Archdiocesan and Royal Cathedral, along with those of Queen Mother Helen.