The Vitruvian Man was a drawing done by the Human Leonardo da Vinci in the late 15th century in Europe on Earth.
After Jonathan Archer restored a damaged timeline, the Vitruvian Man could be seen in the time stream as the timeline realigned itself. (ENT: "Storm Front, Part II")
An animated representation of the Vitruvian Man could also be seen among the mental images from the Admonition that Sutra observed through her mind meld with Agnes Jurati. (PIC: "Et in Arcadia Ego, Part 1")
The cover of The Ferengi Rules of Acquisition features a reference to the Vitruvian Man, replacing the man with an image of Quark.
The cover of Immortal Coil features a reference to the Vitruvian Man with Data replacing the man with one side as a drawing and the other side as a LCARS display image.
Cover of The Ferengi Rules of Acquisition