Procession of Saint Januarius During an Eruption of Vesuvius (French: Procession de saint Janvier àNaples pendant une éruption du Vésuve) is an 1822 oil painting by the French artist Antoine Jean-Baptiste Thomas. It depicts a procession of Saint Januarius, the patron saint of Naples, against the backdrop of the volcano Mount Vesuvius erupting. A major eruption of Vesuvius from October to November 1822. This was reflected in a number of artworks of the era including Horace Vernet's Vesuvius Erupting.
The painting was exhibited at the Salon of 1822 at the Louvre in Paris. Today it is in the collection of the Palace of Versailles.