 Simon de Montfort 's parliament of 1265 is sometimes referred to as the first English parliament , because of its inclusion of both the knights and the burgesses , and Montfort himself is often regarded as the founder of the House of Commons . The 19th century historian William Stubbs popularised the 1295 " Model Parliament " of Edward I as the first genuine parliament ; however , modern scholarship questions this analysis . The historian David Carpenter describes Montfort 's 1265 parliament as " a landmark " in the development of parliament as an institution during the medieval period . 
 Simon de Montfort <a href='null_genetive' title='1'><mark>'s</mark></a>parliament of 1265 is sometimes referred to as the first English parliament , because of its inclusion of both the knights and the burgesses , and Montfort himself is often regarded as the founder of the House of Commons . The 19th century historian William Stubbs popularised the 1295 " Model Parliament " of Edward I as the first genuine parliament ; however , modern scholarship questions this analysis . The historian David Carpenter <a href='uninflect' title='2'><mark>describes</mark></a> Montfort <a href='null_genetive' title='3'><mark>'s</mark></a>1265 parliament as " a landmark " in the development of parliament as an institution during the medieval period . 
Simon de Montfort  parliament of 1265 is sometimes referred to as da first English parliament , cause of its inclusion of both the knights and tdaburgesses , and Montfort hisself is often regarded as the founder of the crib of Commons . Thda9th century historian William Stubbs popularised the 1295 " Model Parliament " of Edward I as thedarst genuine parliament ; however , modern scholarship questions dis analysis . The datorian David Carpenter describe Montfort  1265 parliament as " a landmark " in the development of parliament as an institution durin the medieval period .