Ancient walls are structures built by early civilizations to protect their cities and communities. These walls were often made of stone, brick, or earth and served as a defense against invaders. Many famous examples, such as the Great Wall of China and the Walls of Jericho, showcase the engineering skills of their time. In addition to their defensive purpose, ancient walls also marked the boundaries of cities and held cultural significance. They often featured gates for entry and exit, and some were adorned with carvings or paintings. Today, these walls are important archaeological sites that provide insight into the history and lifestyle of ancient peoples.