Actually the Qin dynasty was the first dynasty to build The Great Wall of China. The dynasty lasted 400 years. The leader was known as Emperor Qin. Qin died 11 years later because of mercury (thought it made him last forever). One last thing, his artists created terra cotta army. The terra cotta army was sculptures of soldiers that help Qin in the after life. Han dynasty just built great walls like Qin. You should take note of everything else because you will need this/