The Romanian Royal Cot of Arms represent the regions of Romania with the Hohenzollern Family Coat of Arms (Quarterly white and black). King Michael's grandfather, King Ferdinand, was born a prince of Hohenzollern-Sigmaringen before succeeding his uncle King Carol I shortly after the start of World War I in 1914.
On top of the achievement as a whole is an heraldic crown in the Continental style. On top of the Shield, however, is a representation of the Steel Crown, the coronation Crown of Romania. This was made for King Carol I of Romania and was forged at the Army Arsenal in Bucharest from the steel of a cannon captured by the Romanian Army from the Ottomans during the War of Independence (1877-1878). Carol I chose steel, rather than gold, to symbolize the bravery of the Romanian soldiers. He received it during the ceremonies of his coronation and of the proclamation of Romania as a kingdom in 1881. It was used again in 1922 at the coronation of King Ferdinand I and Queen Maria as sovereigns of Romania, which took place in Alba-Iulia and also during the coronation and anointing as King of Michael I by the Orthodox Patriarch of Romania, Nicodim Munteanu, in the Patriarchal Cathedral of Bucharest, on the day of his second accession, September 6, 1940.
The Royal Standard below is a fine example of late Art Nouveau/Jugenstil style.
As such, Crown Princess Margareta remains Custodian of the Romanian Crown.