Greek ironclad Vasilissa Olga

The ironclad steam-powered battleship Vasilissa Olga (Βασίλισσα Όλγα), named for Queen Olga of Greece, served in the Royal Hellenic Navy from 1869 to 1925. She was the first of two Hellenic Navy ships to bear this name.

The ship was ordered from the then-Austro-Hungarian shipbuilder Stabilimento Tecnico Triestino for approximately £210,000 when the Hellenic Navy had proven itself inadequate during the Cretan uprising of 1866. Vasilissa Olga served on active duty from 1870 to 1915, but the ship never saw action, as she was converted into cadet training ship in 1894. In 1913, Vasilissa Olga was converted into a hospital ship, stationed at Souda Bay and in 1915, she was removed from active duty and converted into an accommodation hulk for the Hellenic Navy's Souda Bay naval station. She was decommissioned in 1925 and was scrapped.