Miguel de Cervantes – Don Qixote, plate 1: A world of disorderly notions, picked out of his books, crowded into his imagination by Gustave Doré.
On Wikimedia Commons. Note: the high-resolution file linked from the preview image is genuinely high-resolution: 30mb! Detail crops above are at about one quarter full resolution.
I love the tiny knights jousting on mice in front of his feet.