“Medieval Technology? The Middle Ages invented among other things the crank the horse collar eyeglasses the flying buttress the stirrup the windmill the wheelbarrow printing firearms paper the canal lock the compass the rudder the mechanical clock the spinning wheel and the treadle.”

“Medieval Technology? The Middle Ages invented among other things the crank the horse collar eyeglasses the flying buttress the stirrup the windmill the wheelbarrow printing firearms paper the canal lock the compass the rudder the mechanical clock the spinning wheel and the treadle.”

“Medieval Technology? The Middle Ages invented among other things the crank the horse collar eyeglasses the flying buttress the stirrup the windmill the wheelbarrow printing firearms paper the canal lock the compass the rudder the mechanical clock the spinning wheel and the treadle.”