The paintings, sculptures, photographs and shrines to killed protesters are political art of a kind rarely seen in Iraq, where art has been made for at least 10,000 years. It is as if an entire society is awakening to the sound of its own voice, and to the shape, size and sway of its creative force.

“In the beginning this was an uprising, but now it is a revolution,” said Bassim al-Shadhir, an Iraqi-German who goes back and forth between the two countries and has participated in the protests. “There is art, there is theater, people are giving lectures and distributing books — giving them away for free.”

Mr. al-Shadhir, an abstract artist with a degree in biology, painted his contribution to the scene on a wall on Sadoun Street, one of the capital’s broadest thoroughfares. It shows a man shot by the security forces, the blood pouring out of his heart in a vast pool, too large to be hidden or washed away by the masked military man standing behind him.

Nearby a mural begs the United Nations to rescue Iraqis. Another shows a map of Iraq inside a heart and says, “Oh my country, don’t feel pain.” There are two or three murals depicting lions, a symbol of Iraq dating from the Assyrian period and one that protesters have adopted.

There has been little if any new anti-American messages in the paintings in recent days, even though there is more anti-American feeling in Baghdad since the United States last month assassinated Maj. Gen. Qassim Suleimani, the head of Iran’s Quds force who was visiting Iraq.

One reason may be that there are already several murals that have anti-American and anti-Israeli messages. Another is that by now, there are so many walls covered with art, that it is hard to find empty space to add anything new.