49 years ago the Great Wall of China opened for tourists

The history of the Great Wall of China begins when the fortifications built by various ancient Chinese states during the spring and autumn period (7781476 B.C.E.) and the period of warring states (47521 B.C.E.) were bound by China's first emperor, Qin Shi Huang, to protect his newly formed dynasty (2216206 B.C.E.), while luring from the Eurasian nomads.

The walls were built from dense soil, using forced labor and about 212 B.C.E. It stretched from Gansu to the southern coast of Manchuria.

Later dynamics adopted different policies against the protection of the northern border. The Han dynasty (202 B.C.E.;220 C.E.), the Northern Dynasty Qi (5505574), the Sui Dynasty (589%618), and especially the Ming Dynasty (1369) were among those who rebuilt, strengthened and expanded the walls, although they rarely followed the Qin streets.

Hanes extended the fortifications further west, the Qis built about 1,600km. New walls, while Sui mobilised over a million people in their wall-building efforts.

Although a useful obstacle against incubation, at a number of points throughout his history the Great Wall failed to stop his enemies, including in 1644 when Qing Marshuettes marched through the gates of Chanhai crossing and replaced the most active wall-building dynasty, the Mings, as the ruler of China.

Today's Grand Wall of China is widely dated to Ming Dynasty, as they rebuilt much of the wall with stones and bricks, often extending its line to difficult terrain. Some sections remain in relatively good condition or have been renovated, while others have been damaged or destroyed for ideological reasons, dissolved for its upbuilding materials, or lost because of the erosion of time.