- The construction of the city started in 1450.. - The wall is about 11 meters high. - The main part of the wall stretches for about 3,400 kilometers.. - The wall was built during the Ming dynasty in 1400.. - Many parts of the wall were built around 200 B.C.. - The wall is about 11 meters high.. - The main part of the wall is about 3,400 kilometers long.. - Each line of the following passage has one error