Because it was worn by recently freed slaves in Ancient Rome, what cap became the symbol of liberty?
Symbolism in the French Revolution cap, also known as the Phrygian cap, or pileus, is a brimless, felt cap that is conical in shape with the tip pulled forward. The cap was originally worn by ancient Romans and Greeks. The cap implies ennobling effects, as seen in its association with Homer's Ulysses and the mythical twins, Castor and Pollux. The emblem's popularity during the French Revolution is due in part to its importance in ancient Rome: its use alludes to the Roman ritual of manumission of slaves, in which a freed slave receives the bonnet as a symbol of his newfound liberty. The Roman tribune
Red blood of those killed in the demonstrations, and to call for the repression of those they considered counter-revolutionary. During the French Revolution, many in the Paris crowds also wore a red phrygian cap, a symbol of liberty, modeled after the caps worn in ancient Rome by freed slaves; but the colors of the Revolution finally became blue, white and red. The red in the French flag was taken from the emblem of the city of Paris, where it represented the city's patron saint, Saint Denis. Karl Marx published the Communist Manifesto in February 1848, with little attention. However, a few