Which monarch was killed by Ravaillac?

 title: 'A classical temple with columns.'

Henry Quatre was assassinated[1]. 'There, inthenarrow RuedelaFerronniere...wasenacted themost deadly and sensational ofall “single combats”...when a“monster from hell”intheform ofFrancois Ravaillac...delivered three deadly thrusts attheheart of“Henri Qjaatre [sic]”[1].