Which surviving work made Pliny the Elder famous?

Pliny the Elder is famous for his encyclopedic work titled Natural History.12

While seven writings are attributed to him, the Natural History is the only one that has survived to the present day. Although he authored other works—including a history of Rome, a biography of Pomponius Secundus, and studies on grammar and military campaigns—these were lost in antiquity and did not contribute to his enduring legacy. The Natural History, which covers a vast array of topics including cosmology, geography, zoology, botany, and medicine, served as a primary authority on scientific matters until the Middle Ages and remains a significant literary monument of classical antiquity.12