The Middle Ages
Just like Cleopatra was a trend-setter in her time, so too was Queen Elizabeth I during the Middle Ages. She set the precedence for hair removal among women, who followed her lead by removing it from their faces, but not their bodies. The fashion of this era was to remove eyebrows and hair from the forehead (to make it appear larger), which women did by using walnut oil, or bandages soaked in ammonia (which they got from their feline pets) and vinegar.
via The shockingly cool history of hair removal – The Middle Ages | Gallery | Glo.