The Gothic style originated in the 12th century at the Abbey Church of St. Denis in France. Abbot Suger rebuilt the choir and added a new west front, flooding the church with light from large stained glass windows. This inspired the Gothic architectural innovations of pointed arches, ribbed vaults, and flying buttresses which allowed buildings to be constructed much taller, with huge walls of glass. Gothic cathedrals like Notre Dame and Chartres featured immense rose windows and narratives in stained glass that served as "bibles for the poor." Wealthy patrons and trade guilds donated windows to enhance their prestige and commemorate their patron saints.