Birkenstock influx of people has now become essential parity in mind shoes, but in fact it is dedicated to the king a minister began manufacturing Queen shoes. 1774 began, the German Birkenstock family has engaged in making shoes for the Royal services. In 1897, Johann's grandson Konrad Birkenstock think of a seemingly ordinary but a new concept: the average person's foot is a curve, but very strange shoes, often within the cage plate. So he thought that if the shoes can be close to the feet of the curve, that is how comfortable it! So he invented the soles of the feet close to the line of insoles, and much used by the shoemaker. In 1902, he designed the first of the "thoughtful plantar arch of the sole" (flexible arch support), and widely accepted for the factory, joined in the mass production of footwear. This has particularly successful marketing of the soles of shoes. 1913 began with the medical cooperation, and began to use mass production factories, and topics to promote healthy shoes, certainly by the time the medical profession.