Complex sentence: Paschal, however, refused to take so extreme a step; and the quarrel entered upon a new stage in 1115 when Matilda of Tuscany, died leaving her vast estates to the papacy.
Split into simpler sentences: Paschal, however, refused to take so extreme a step. The quarrel entered a new stage in 1115 when Matilda of Tuscany died, leaving her vast estates to the papacy.