Iraq is home to many ancient and historical cities that have existed for hundreds and even thousands of years. These cities are important because they show the rich culture, history, and civilizations that once lived in this region.

At least 20 cities in Iraq are known to be over one hundred years old. Some of these cities, like Babylon, Ur, and Nineveh, go back several centuries and were part of great empires such as the Sumerians, Akkadians, Babylonians, and Assyrians. These cities had advanced knowledge in science, law, writing, and construction.

Iraq’s location between the Tigris and Euphrates rivers made it a perfect place for early civilization to grow. Because of this, many cities were built in ancient times and some of them still exist today with modern life continuing over the ancient ruins.

Many of these cities have been studied by historians and archaeologists who found buildings, tablets, and tools that give us more information about human history. These old cities are not only important for Iraq but for the whole world’s understanding of early civilization.

So, the correct answer is 20.