The building span over many Chinese Dynasties or for about 22 centuries. The Great Wall of China was built in different dynasties. On June 5th, 2012, after four years of investigation, with concerted efforts of over 4,000 technicians, it came to a conclusion that the accurate The construction of the wall ended in the Ming Dynasty in 1644. Ming Great Wall. Facts About The Great Wall of China Length of the Wall. https://www.worldatlas.com/articles/how-long-is-the-great-wall-of-china.html The Great Wall of China took over 2,000 years to build. The total length when all the dynasties are combined would be 21,196.18 kilometers. https://www.travelchinaguide.com/china_great_wall/facts/how-tall.htm The wall constructed during the Ming dynasty, the most well-preserved section, is about 8,850 kilometers (5,499 miles) long. The total length of all sections of the Great Wall of China ever built adds up to about 21,196 kilometers (13,171 miles), including overlapping sections that were rebuilt. The Great Wall is one of the largest human-made construction projects globally; the Great Wall … This measurement was declared by China’s State Administration of Cultural Relics in 2012.