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.

Stabilimento Tecnico Triestino (STT) ("Technical Establishment of Trieste") was a private shipbuilding company based in Trieste from the mid-19th to early 20th century, and the most important naval shipbuilding firm of the Austro-Hungarian Empire.