Supermarina was the headquarters of the Italian Royal Navy (Regia Marina) established on 1 June 1940, just before Italy entered the Second World War.

[1] The Supermarina headquarters at Lungotevere Flaminio in Rome, was completed in 1938 and was inaugurated by Benito Mussolini on 14 October.

[1] When the capital was declared an open city, in 1943, Supermarina moved to Santa Rosa on the Via Cassia, about 20 km (12 mi) from Rome.

From 10 June 1940 to 8 September 1943, Supermarina supervised all Italian naval operations in the Battle of the Mediterranean, the Red Sea and the oceans.

[1] After 8 September 1943, Supermarina issued orders for the execution of the clauses of the Armistice of Cassibile, the transfer of all seaworthy ships into Allied-controlled ports and the scuttling or sabotage of ships unable to sail, to avoid their capture by the Germans and then ceased operations on 12 September 1943, following the German capture of Rome.