Suppose The Great Wall of China is the collective name of a series of fortification systems generally built across the historical northern borders of China to protect and consolidate territories of Chinese states and empires against various nomadic groups of the steppe and their polities. Several walls were being built from as early as the 7th century BC; these are now collectively referred to as the Great Wall.
Can we infer that "The Great Wall of China was built in the 19th century."?