Napoléon on the Battlefield of Eylau () is an oil painting of 1808 by French Romantic painter Antoine-Jean Gros. Completed during the winter of 1807–1808, the work became an icon of the emerging style of French Romanticism. It depicts a moment from the aftermath of the bloody Battle of Eylau (7–8 February 1807) in which Napoléon Bonaparte surveys the battlefield where his "Grande Armée" secured a costly victory against the Russians. Although "Napoleon on the Battlefield of Eylau" retains elements of history painting, it is by far Gros's most realistic work depicting Napoleon and breaks from the subtlety of Neoclassicism. The painting is housed at the Louvre in Paris.