The term "Roman Walls" refers to the fortifications built by the ancient Romans to protect their cities and territories. These walls were constructed using stone, brick, and mortar, and often featured towers and gates for defense. Many cities, such as Rome and London, had extensive wall systems that served both military and administrative purposes. In addition to their defensive role, Roman Walls also marked the boundaries of urban areas. They facilitated trade and movement while providing a sense of security for the inhabitants. Some of these walls, like the Aurelian Walls in Rome, still stand today, showcasing the engineering skills of the Roman Empire.