''Contrary to Enlightenment propaganda, major advances were made in all areas during the so-called Dark Ages – science and education (universities), power generation (water and wind mills), architecture (gothic architecture, eg Chartres Cathedral), agriculture (crop-rotation, heavy plough, horse-collar), warfare (cannons, heavy-armoured cavalry), music (musical notation) and much more.''
and that's without mentioning the great scientific contributions from the Islamic world
