The Portrait of Luca Pacioli is a painting attributed to the Italian Renaissance artist Jacopo de' Barbari, dating to around 1500 and housed in the Capodimonte Museum, Naples, southern Italy.

[4] According to one scholar, in the rhombicuboctahedron featured in the portrait "we surely see the ineffable left hand of Leonardo da Vinci, who drew the superb pictures for De divina proportione, which, moreover, hang from a string in the originals.

"[5] The painting portrays the friar and mathematician with a table filled with geometrical tools: slate, chalk, compass, a dodecahedron model.

A rhombicuboctahedron, half-filled with water and characterized by a detailed triple reflection effect of the Ducal Palace of Urbino, is suspended from the ceiling.

[6][3] Dürer wrote in October 1506 (during his second trip to Italy) that he planned to ride from Venice "to Bologna to learn the secrets of the art of perspective, which a man is willing to teach me.