Pliny the Elder, from a Roman cameo. This is the only portrait reputed to be of Pliny, but its identity is disputed, and no confirmed likeness survives. Collection Cades C/211. Gaius Plinius Secundus (23 AD - August 25, AD 79), better known as Pliny the Elder, was a Roman author, naturalist, and natural philosopher, as well as naval and army commander of the early Roman Empire, and personal friend of the emperor Vespasian. Spending most of his spare time studying, writing or investigating natural and geographic phenomena in the field, he wrote an encyclopedic work, Naturalis Historia, which became a model for all such works written subsequently. He died on August 25, AD 79, while attempting the rescue by ship of a friend and his family from the eruption of Mount Vesuvius that had just destroyed the cities of Pompeii and Herculaneum. The prevailing wind would not allow his ship to leave the shore. His companions attributed his collapse and death to toxic fumes, but they were unaffected by the fumes, suggesting natural causes at the age of 56.