Three Roman brothers swear to their father that they will fight to the death for Rome against three champions from a rival city. On the right, the women of the family collapse in grief: one of the sisters is engaged to one of the enemy brothers.

David painted it in Rome in 1784 and it became the manifesto of Neoclassicism: hard light, clean lines, duty over feeling. Look at the three raised swords, the exact center of the picture.