Simon de Montfort, 6th Earl of Leicester ( – 4 August 1265), also called Simon de Munford and sometimes referred to as Simon V de Montfort to distinguish him from other Simons de Montfort, was a French nobleman who inherited the title and estates of the earldom of Leicester in England. He led the rebellion against King Henry III of England during the Second Barons' War of 1263–64, and subsequently became de facto ruler of England. During his rule, de Montfort called two famous parliaments. The first stripped the King of unlimited authority, the second included ordinary citizens from the towns. For this reason, Montfort is regarded today as one of the of modern parliamentary democracy. After a rule of just over a year, Montfort was killed by forces loyal to the King in the Battle of Evesham.