Complex sentence: The year 1600 is considered the beginning of the era of modern freethought, as it is marked by the execution in Italy of Giordano Bruno, a former Dominican Monk, by the Inquisition.
Split into simpler sentences: The year 1600 is considered a landmark of the era of modern freethought. It was the year of the execution in Italy of Giordano Bruno, a former Dominican Monk, by the Inquisition.