the great wall of china (23h 11min, aug 30, 770 y BC – may 6, 476)
Description:
A first set of walls, designed to keep Mongol nomads out of China, were built of earth and stones in wood frames during the Qin DynastySome additions and modifications were made to these simple walls over the next millennium but the major construction of the "modern" walls began in the Ming Dynasty
Added to timeline:
Date:
23h 11min, aug 30, 770 y BC
may 6, 476
~ 1247 years