Gioacchino Assereto was a notable Italian painter during the early Baroque period. A prominent history painter in Genoa in the first half of the 17th century, his works portray the events of history. While many Italian painters of this period had their influences from the Middle Ages, Assereto's works reflect a different aesthetic. While his paintings tend to be more abstract, he also painted scenes with a realistic feel.

The majority of Assereto's works are religious and historical subjects. While he did produce some portraits, most of his work was in the Baroque style. Assereto used chiaroscuro and sfumato techniques to convey emotion and drama. In his late teens, he developed his style and technique. He was inspired by Caravaggism, which he discovered in Rome. He also took a trip to Paris in 1639, where he learned about the work of Camillo Manzitti and Tiziana Zennaro.

Gioacchino Assereto's earliest dated works are of Saint John the Baptist, Bernard, Catherine, and George (1626). His paintings are rich in colour and awe-inspiring. His most famous work, The Ecstasy of St. Francis, sold for $120,000 at a Sotheby's auction in December 2015. The artist is credited with several works that are in the Museum of Fine Arts in London and are now part of major public collections.