People of Irish descent are the second largest self-reported ethnic group in the United States, after German Americans. Nine of the signatories of the American Declaration of Independence were of Irish origin.eople of Irish descent are found mainly in English-speaking countries; especially Great Britain, the United States, Canada and Australia. There are also significant numbers in Argentina and Mexico.
Despite its long history, the Great Wall of China as it is exists today was constructed mainly during the mighty Ming dynasty (1368-1644). Like the Mongols, the early Ming rulers had little interest in building border fortifications, and wall building was limited before the late 15th century.
Since then, the Great Wall was rebuilt, modified or extended throughout Chinese history for over 2,000 years. Most of the Great Wall we see today was built in the Ming Dynasty (1368-1644). In some areas, two walls built in two different dynasties can be seen running side by side. For a more detailed history of China and the Great Wall, please click here.