Many American history books begin with the year 1492 and the discovery of the Caribbean Islands by Spanish explorer Christopher Columbus (1451–1506). For the great civilizations of Mesoamerica and South America, though, 1492 proved to be the beginning of the end of their civilization. The products of thousands of years of history—the cities, the architecture, markets, governments, economic systems, legal systems, schools, books, holy shrines—even the daily prayers of the people—were about to be willfully eliminated by the conquering European nations. The rupture would prove so deep that many aspects of pre-Hispanic American culture and tradition were forever deleted from the human memory. Fortunately, some of the important history of the early civilizations.