when did the 16th century begin and end
16th century The 16th century begins with the Julian year 1501 and ends with either the Julian or the Gregorian year 1600 (depending on the reckoning used; the Gregorian calendar introduced a lapse of 10 days in October 1582).[1]
19th century The 19th century was a period of social change. Slavery was abolished, and the Second Industrial Revolution led to massive urbanization and much higher levels of productivity, profit and prosperity. European imperialism brought much of Asia and almost all of Africa under colonial rule.