Original sentence: Many of the earlier priceless papal tiaras (most notably the tiaras of Pope Julius II and that attributed to Pope Saint Silvester) were destroyed, dismantled or seized by invaders (most notably by Berthier's army in 1798), or by popes themselves; Pope Clement VII had all the tiaras and papal regalia melted down in 1527 to raise the 400,000 ducats ransom demanded by the occupying army of Holy Roman Emperor Charles V
Edited sentence: Unfortunately many of the earlier priceless papal tiaras (most notably the tiaras of Pope Julius II and that attributed to Pope Saint Silvester) were destroyed, dismantled or seized by invaders (most notably by Berthier's army in 1798), or by popes themselves; Pope Clement VII had all the tiaras and papal regalia melted down in 1527 to raise the 400,000 ducats ransom demanded by the occupying army of Holy Roman Emperor Charles V