The Steel Crown of King Carol I of the Romanians was forged at the Army Arsenal (Arsenalul Armatei) in Bucharest from the steel of a cannon captured by the Romanian Army from the Ottomans during its War of Independence.
Carol I chose steel, and not 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 is the same Crown used in 1922 at the coronation of King Ferdinand I and Queen Maria as sovereigns of Romania, which took place in Alba-Iulia. The Crown was used 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 very day of his second accession, September 6, 1940.
The funeral of King Mihai I of the Romanians in December 2017, with the crown on the coffin.