Although the precise number remains unresolved, approximately 3,873,000,000 individual bricks were used to construct the Great Wall of China. The binding material for the bricks was made from glutinous rice flour.
The Great Wall of China, one of the world's most iconic structures, was commissioned by the ancient Chinese feudal warlords to serve as fortification against foreign invaders. The defensive wall starts from Liaoning and it traverses across Hebei, Tianjin, Beijing, Shanxi, Shaanxi and Ningxia, before the wall ends in Gansu.
As of 2015, the Great Wall's official length is 5,500 miles. However, from the time of its construction, some estimate that the wall ran a total distance of approximately 13,170 miles. During the mid-1960s until the mid-1970s, a large number of bricks were removed from the Great Wall to construct houses, agricultural buildings and reservoirs.