Leonardo da Vinci: Thinker, Researcher, and Poet

The following image description refers to the famous "Portrait of a Man in Red Chalk," widely accepted as a self-portrait of Leonardo da Vinci in his later years, circa 1512.

Image Description:
A high-quality reproduction of Leonardo da Vinci's iconic self-portrait, drawn in red chalk also known as sanguine, a drawing medium made of earth pigments. The portrait depicts an elderly man with long, flowing hair and a long beard, with deeply set eyes and a pensive expression. The original is held in the Royal Library original: "Biblioteca Reale" in Turin.