: Used local earth, stone, and even sticky rice mortar for strength.
Its purpose was to protect China from outside aggression, but also to preserve its culture from the customs of foreign barbarians. UNESCO World Heritage Centre Build the Great Wall Lesson Plan - Crayola The Great Wall
: Initial fortifications joined by Emperor Qin Shi Huang . : Used local earth, stone, and even sticky
: Features watchtowers for signaling (smoke/fire) and beacon towers for communication. : Used local earth