<P> 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 ) . </P>
when did the 16th century begin and end
begins with the Julian year 1501 and ends with either the Julian or the Gregorian year 1600