The piece is called “The Sudarium of Saint Veronica,” created by the French artist Claude Mellan in 1649.

Here are the key details that make it so remarkable:   One Continuous Line: The entire image of Jesus’s face is created from a single, unbroken engraved line that spirals out from the tip of the nose.    Masterful Technique: To create light, shadow, and form, Mellan didn’t use any cross-hatching (the standard technique of the time). Instead, he masterfully varied the thickness and thinness of that single line. Where the line swells and becomes thicker, it creates a darker area; where it thins out, it creates a highlight.  A Tour de Force: This work was a demonstration of Mellan’s absolute control over his tool, the burin. It is considered a pinnacle of technical virtuosity in the art of engraving.  Symbolic Meaning: The use of a single, continuous line is often interpreted as symbolic of the eternity and singularity of God, creating the divine image from a single point.