Complex sentence: One night during a trip, Lucrezia Borgia checked into an inn in the small town and during the night the host became so captivated by Lucrezia's beauty that he could not resist the urge to peek into her room through the keyhole.
Split into simpler sentences: One night during a trip, Lucrezia Borgia checked into an inn in the small town. Over the course of the night the host became so captivated by Lucrezia's beauty that he could not resist the urge to peek into her room through the keyhole.