SMS Sankt Georg was the third and final armored cruiser of the Austro-Hungarian Navy. She was built at the Pola Arsenal; her keel was laid in March 1901, she was launched in December 1903, and completed in July 1905. Her design was based on the previous armored cruiser Kaiser Karl VI, with the primary improvement being a stronger armament. Sankt Georg, named for Saint George, was armed with a main battery of two 24-centimeter (9.4 in) guns, five 19 cm (7.5 in) guns, and four 15 cm (5.9 in) guns.

SMS Kaiser Karl VI was the second of three armored cruisers built by the Austro-Hungarian Navy. She was built by the Stabilimento Tecnico Triestino in Trieste between June 1896 and May 1900, when she was commissioned into the fleet. Kaiser Karl VI represented a significant improvement over the preceding design—Kaiserin und Königin Maria Theresia—being faster and more heavily armed and armored. She provided the basis for the third design, Sankt Georg, which featured further incremental improvements. Having no overseas colonies to patrol, Austria-Hungary built the ship solely to reinforce its battle fleet.