"Simon de Montfort's Idea was to make the Parliament more Representative by inviting one or two vergers, or vergesses, to come from every parish, thus causing the only Good Parliament in History." (W. C. Sellar and R. J. Yeatman, "1066 and All That")
During the continuous troubles of Henry III's reign, fighting his barons over the Magna Charta, Simon de Montfort, 6th Earl of Leicester, called together the first English Parliament that included representatives from the lesser nobility from the shires as well as burgesses representing the boroughs, today, somewhere in the Midlands on a 20th of January, 748 years ago in 1265.
The whole affair ended in tears though, since the barons did not really treat the commoners' representatives as equals and the parliament dissolved in dispute a couple of weeks later. Simon de Montfort was killed in the Battle of Evesham against Royal forces in August of the same year.