Why did San Marco Freeing the Slave make Tintoretto famous?

The painting San Marco Freeing the Slave (also known as the Miracle of the Slave) made Tintoretto famous at the age of 30 by establishing him as a leading artist among the younger generation of Venetian painters.12

The work garnered significant attention from both artists and literary figures of the time. Notably, the writer Pietro Aretino sent a letter to the painter full of praise, which served to confirm his rising reputation, even while attempting to temper the artist's youthful exuberance.1

Artistically, the painting was highly influential because it was rich in structural elements characteristic of post-Michelangelesque Roman art, suggesting that Tintoretto had likely visited Rome to study these techniques. This synthesis of styles, combined with his unique approach to narrative and form, marked a pivotal moment in his career, transitioning him into a sought-after painter in Venice.12