The liberty leading the people/la libérte guidant le peuole | Eugène Delacroix 1830.
This is one of my favorite art pieces. I love the composition of the piece (piramidal) that allows the artist to put the allegory of the liberty (the woman) on the centre and top of the composition. I also like the colors the artist uses and the contrast between them (the sky and the flag for example). I also love the painting because is set in the same time as Les Misérables by Victor Hugo. Finally, just say that I've had the pleasure to see this amazing masterpiece in the Louvre Museum, Paris.
Quite amazing and big!