The common name for the Great Wall of China is simply "The Great Wall." It is a series of fortifications primarily made of brick, tamped earth, wood, and stone, built to protect Chinese states and empires from invasions. Constructed over several dynasties, notably the Ming Dynasty, it stretches over 13,000 miles. While often associated with strength and perseverance, the wall also symbolizes the rich history and cultural significance of China. It attracts millions of tourists each year and is recognized as a UNESCO World Heritage Site due to its architectural and historical significance.