Primitive elevators had been in use as early given that the 3rd century BC and were operated by human, animal, or h2o wheel energy. In 1743, a counter-weighted, guy-run personalized elevator was crafted for King Louis XV, connecting his apartment in Versailles with that of his mistress, Madame de Chateauroux, http://deanscjqx.educationalimpactblog.com/6417792/the-2-minute-rule-for-elevator-thoughtworks