Mario Gaetano Gioffredo, also called the Neapolitan Vitruvius (14 May 1718 – 8 March 1785), was an Italian architect, engineer, and engraver.

He was born and died in Naples. He trained under Martino Buonocore.^[1] He was active in a Neoclassical style. He designed the Palazzo Partanna in Naples. He also worked in designs for the Teatrino of the Palazzo d'Afflitto (1748); the design of the Palazzo Latilla (1754), and the Palazzo Cavalcanti (1762). He designed the church of Spirito Santo (1774),^[2][3] and the monasteries of Maria Maddalena and Santa Caterina da Siena.^[4]

He wrote a treatise of architecture (1768).^[5] In 1783, he was named the Royal architect to the Neapolitan Court, but had become blind.^[6]