What invention did Archimedes get most of his fame from?

Archimedes is most famous for his work on the principle of buoyancy, often summarized in the phrase "Eureka!" associated with his discovery of how to determine the volume of irregular objects using water displacement. Additionally, he is renowned for the invention of the Archimedean screw, a device for raising water, which has been used for irrigation and drainage. His contributions to mathematics, physics, and engineering have cemented his legacy as one of the greatest ancient scientists.